The plural of mouse is mice when referring to the animal. For a computer device, mice is the most widely accepted plural in general English, while mouses also appears in technical and product writing. Therefore, use mice by default, and choose mouses only when a specific technical style or distinction requires it.
Key Facts at a Glance
Mice is the standard plural of mouse for the rodent.
Mice is also the safest plural for computer hardware in formal and general writing.
Mouses is an established alternative for multiple computer devices, especially in technical contexts.
Mices is not the standard plural form.
The animal noun and the computer noun have the same singular form, but usage conventions can differ.
The vowel change in mouse/mice comes from historical Germanic inflection, not from adding a regular -s ending.
What Is the Plural of Mouse?
The plural of mouse is mice. The word mice applies to two or more rodents and is also the usual plural for two or more computer pointing devices.
Examples make the distinction clear:
- “The cat caught two mice.”
- “The laboratory houses several mice.”
- “The office needs six wireless mice.”
- “The software supports multiple mice on one workstation.”
The alternative mouses is grammatically possible when mouse means a computer device. Many writers still prefer mice, because the form is familiar and widely understood. In ordinary schoolwork, business writing, journalism, and most web copy, mice is the least controversial choice.
The answer is not mices. English does not normally create a second plural by attaching -s to the already irregular plural mice.
Which Plural Is Correct for a Computer?
Mice is the default plural for computer hardware, while mouses is an accepted technical alternative. The choice depends on the publication’s style guide, the intended audience, and whether the writer needs to distinguish devices from animals.
| Context | Recommended form | Example | Reason |
|---|---|---|---|
| General English | Mice | “Three mice are connected.” | Most familiar plural |
| Academic writing | Mice | “The test used four mice.” | Formal readers expect the established form |
| Product documentation | Mice or mouses | “Connect two mice.” | Follow the company terminology |
| Technical distinction | Mouses | “The lab tested 12 computer mouses.” | Separates devices from animals |
| Retail copy | Mice | “Compare ergonomic mice.” | Common consumer wording |
| Programming discussion | Mice or mouses | “The API detects multiple mice.” | Depends on documentation convention |
A technical writer should not treat mouses as automatically wrong. The form appears in dictionaries and specialized usage, particularly when writers regard the computer device as a distinct noun. However, a writer should not alternate between mice and mouses within the same document without a stated reason.
When Does Mouses Make Sense?
Mouses makes sense when a technical document consistently treats a computer mouse as a device category rather than as an animal metaphor. It can also reduce ambiguity in sentences such as “The enclosure contains mice,” where readers might initially imagine rodents.
That distinction is optional, not mandatory. The sentence “The workstation supports four mice” is grammatical and immediately understandable. The sentence “The workstation supports four mouses” is also defensible, but some readers may perceive it as unusual because mice remains the dominant everyday form.
A practical rule is simple: use mice unless a customer specification, software manual, database schema, or internal style guide explicitly prefers mouses.
Why Does Mouse Become Mice?
Mouse becomes mice because Old English used a historical vowel-changing plural, known as i-mutation or umlaut. An earlier plural vowel was influenced by an i or y sound in the ending, and the changed form survived after the original ending disappeared.
Old English recorded the singular as mūs and the plural as mȳs. Modern English inherited the vowel contrast, although pronunciation later changed. The modern forms are pronounced approximately:
- mouse: /maʊs/
- mice: /maɪs/
The explanation sometimes presented as “the Great Vowel Shift changed moos into mows and mees into mice” is too compressed. The Great Vowel Shift affected the later pronunciation of many English vowels, but it did not by itself create the mouse/mice plural. The vowel alternation is older and belongs to the history of Germanic inflection.
| Singular | Plural | Historical pattern | Modern meaning |
|---|---|---|---|
| Mouse | Mice | Vowel alternation | Rodent or computer device |
| Foot | Feet | Vowel alternation | Part of the body |
| Tooth | Teeth | Vowel alternation | Part of the body |
| Goose | Geese | Vowel alternation | Bird |
| Man | Men | Vowel alternation | Adult person |
| Louse | Lice | Vowel alternation | Parasitic insect |
These forms are often called irregular plurals, although “irregular” means that they do not follow the productive modern -s pattern. They are not random. Their forms preserve older patterns that English gradually replaced with regular plurals.
How Does Mouse Work in Biological Writing?
In biological writing, mice is the only standard plural for the animal. The word may describe several species or several individual rodents, and scientific writers may add a species name when taxonomic precision matters.
Examples include:
- house mice, commonly associated with Mus musculus
- field mice, a common name that can refer to different species depending on location
- laboratory mice, used in biomedical research
- deer mice, commonly associated with the genus Peromyscus
- feeder mice, a pet-trade term for mice sold as food for reptiles
The plural does not change to mouses because the animal is being discussed commercially, scientifically, or casually. A pet-store advertisement may say “frozen feeder mice,” and a research paper may say “experimental mice.”
| Biological term | Typical meaning | Example usage | Important qualification |
|---|---|---|---|
| House mouse | Mus musculus | “House mice entered the pantry.” | Species identification may require expert review |
| Field mouse | Several possible wild species | “Field mice live near crops.” | Common name varies by region |
| Laboratory mouse | Research animal | “Laboratory mice received the compound.” | Often refers to defined strains |
| Feeder mouse | Live or frozen food item | “The shop sells feeder mice.” | Retail prices vary by size and region |
| Deer mouse | Often Peromyscus maniculatus | “Deer mice occupy woodland habitat.” | Common name is not a universal taxonomic substitute |
Typical house-mouse litters contain roughly 4-12 pups, although litter size varies with strain, age, food supply, and environmental conditions. Mouse gestation commonly lasts about 19-21 days. Those biological numbers explain the term’s context, but they do not affect its plural.
What Is the Plural of Mouse Button and Mouse Pad?
Compound terms usually pluralize the main noun, not the modifier. Therefore, the standard forms are mouse buttons, mouse pads, mouse pointers, and mouse drivers, not mice buttons or mice pads.
In the compounds below, mouse functions as a noun modifier describing the type of object. English normally leaves that modifier singular.
| Singular compound | Standard plural | Incorrect or less suitable form | Example |
|---|---|---|---|
| Mouse button | Mouse buttons | Mice buttons | “Replace both mouse buttons.” |
| Mouse pad | Mouse pads | Mice pads | “The store stocks washable mouse pads.” |
| Mouse pointer | Mouse pointers | Mice pointers | “The update changes mouse pointers.” |
| Mouse driver | Mouse drivers | Mice drivers | “Install the latest mouse drivers.” |
| Computer mouse | Computer mice | Computer mouses, unless house style requires it | “The lab purchased computer mice.” |
| Wireless mouse | Wireless mice | Wireless mouses, unless technical style requires it | “Wireless mice use Bluetooth.” |
A compound can behave differently when mouse is the principal noun. In computer mice, the noun is mice, modified by computer. In mouse buttons, the noun is buttons, modified by mouse.
This rule also explains why mouse settings remains unchanged in the modifier. The settings belong to a mouse, but the plural noun is settings.
How Do You Pronounce Mouse and Mice?
Mouse rhymes with house, while mice rhymes with ice. The singular uses the vowel sound /aʊ/, and the plural uses /aɪ/.
| Word | Approximate pronunciation | Rhymes with | Meaning |
|---|---|---|---|
| Mouse | /maʊs/ | House | One animal or device |
| Mice | /maɪs/ | Ice | More than one animal or device |
| Mouses | /ˈmaʊsɪz/ | Houses, approximately | Alternative device plural |
| Mices | Not standard | None | Nonstandard attempted plural |
The pronunciation of mice is the same for rodents and computer devices. Context supplies the meaning. In speech, “I bought two mice” normally means two computer peripherals if the conversation concerns a desk, while “I saw two mice” normally means animals if the conversation concerns a kitchen or field.
Is Mouses Wrong?
Mouses is not automatically wrong, but it is less common than mice and is restricted mainly to the computer-device meaning. Writers should use it when a technical convention, product taxonomy, or ambiguity concern supports the choice.
Major dictionaries differ in how they describe the word. Merriam-Webster includes mouses as a plural for the computer device, while the Oxford English Dictionary documents historical usage and examples rather than imposing a single universal rule for every modern publication. Editorial organizations can also make different house-style decisions.
The key distinction is between grammatical possibility and preferred usage:
- Mice is broadly accepted for animals and devices.
- Mouses is accepted by many authorities for devices.
- Mices is not the normal standard plural.
- Mixing mice and mouses can make technical copy look inconsistent.
- A style guide can select one form for uniformity without proving the other form ungrammatical.
The form mouses may be useful in a sentence such as “The test involved mice and computer mouses.” Even there, rewriting may sound smoother: “The test involved rodents and computer pointing devices.”
How Should Technical Writers Choose Between Mice and Mouses?
Technical writers should choose mice for broad readability and mouses only when device-specific terminology improves precision. The best choice is the one used consistently across headings, interface labels, specifications, examples, and support articles.
Use mice when:
- The audience includes general consumers.
- The document follows conventional general-English style.
- Search visibility and familiar wording matter.
- The context already makes the computer meaning obvious.
- The product documentation uses mice elsewhere.
Use mouses when:
- A software system distinguishes animal objects from input devices.
- A database or API uses mouse as a product class.
- A technical organization has adopted mouses in its terminology.
- A sentence would otherwise create a meaningful ambiguity.
- A controlled vocabulary requires regular device plurals.
A copy editor should search the full document for both forms before publication. Consistency matters more than a theoretical preference, especially in manuals that repeat the noun dozens of times.
Which Form Works Best in Common Sentences?
| Intended meaning | Preferred sentence | Why it works |
|---|---|---|
| Rodents | “The barn contains mice.” | Standard biological plural |
| Computer devices | “The office ordered ten mice.” | Familiar general-English usage |
| Device specification | “The hub supports four mouses.” | Defensible if the manual uses device-specific terminology |
| Mixed meanings | “The study compares rodents with computer mice.” | Removes ambiguity |
| Product category | “Choose a mouse for each workstation.” | Singular generic construction avoids the issue |
| Formal rewrite | “The lab tested twelve computer pointing devices.” | Maximum clarity in mixed contexts |
The singular generic construction is often the cleanest solution. Instead of debating the plural in a product headline, write “Select a wireless mouse” or “Compare computer pointing devices.”
Can Mouse Be a Verb?
Mouse can be a verb, and its forms follow regular English conjugation. The verb usually means to move a cursor over something with a computer mouse, although older usage can mean to search or prowl like a mouse.
Computer examples include:
- “Mouse over the icon to display the tooltip.”
- “She moused across the map.”
- “The user is mousing through the menu.”
- “The application records mouse movements.”
The past tense is generally moused, and the present participle is mousing. The third-person singular form is mouses, as in “The cat mouses around the grain store,” although that animal-related verb is uncommon in modern everyday prose.
The plural noun mice is not a verb. In “The cat mouses in the barn,” mouses is a verb. In “The barn contains mice,” mice is a plural noun.
Which Mouse Forms Are Incorrect?
Mices is the main nonstandard plural to avoid, while mice and mouses require different contextual judgments. English speakers sometimes create mices by applying regular -s spelling to the pronunciation or by assuming every plural needs a visible ending.
| Form | Standard status | Meaning or function | Recommended use |
|---|---|---|---|
| Mouse | Standard singular noun | One animal or device | Use normally |
| Mice | Standard plural noun | Multiple animals or devices | Default plural |
| Mouses | Accepted device plural | Multiple computer devices | Use consistently when appropriate |
| Mices | Nonstandard plural | Intended as multiple mice | Replace with mice |
| Moused | Standard past verb | Used a mouse or searched like one | Use as a verb |
| Mousing | Standard participle | Moving a pointer or searching | Use as a verb form |
Spellcheck behavior does not settle the grammatical question. A word processor may flag mouses because its dictionary prioritizes common general-English forms, or it may accept the word because its dictionary includes the technical usage. Dictionary settings are editorial tools, not final authorities.
How Do Possessives Work With Mouse and Mice?
The singular possessive is mouse’s, and the plural possessive is mice’s when the sentence refers to multiple mice. For computer devices, the same forms apply when the writer chooses mouse and mice as the nouns.
Examples:
- “The mouse’s sensor is damaged.”
- “The mice’s enclosure requires cleaning.”
- “The mice’s batteries were replaced.”
- “The mouses’ firmware was updated.”
The last example uses mouses as a regular plural, so its plural possessive is mouses’. Because that construction can look awkward, technical writers often rewrite it as “the firmware of the computer mice” or “the devices’ firmware.”
| Number | Noun | Possessive | Example |
|---|---|---|---|
| Singular | Mouse | Mouse’s | “The mouse’s cable is short.” |
| Plural | Mice | Mice’s | “The mice’s habitat is clean.” |
| Device plural | Mouses | Mouses’ | “The mouses’ firmware differs.” |
| Irregular plural without s | Mice | Mice’s | “The mice’s movement was recorded.” |
The apostrophe does not create a plural. It marks possession or association. Mouse’s means belonging to one mouse, while mice means more than one mouse.
Does the Plural Change for Gaming, Wireless, or Ergonomic Devices?
The plural does not change according to device type. Gaming mice, wireless mice, ergonomic mice, optical mice, and vertical mice all use mice as the default plural; mouses remains an optional technical alternative.
| Device category | Typical price range | Typical service life | Common features |
|---|---|---|---|
| Basic office mouse | $10-$30 | 2-4 years | 800-1,600 DPI, USB connection |
| Wireless travel mouse | $15-$50 | 1-3 years | Bluetooth or 2.4 GHz, compact body |
| Ergonomic mouse | $25-$100 | 2-5 years | Vertical or contoured shape |
| Gaming mouse | $40-$150+ | 2-4 years | 1,000-8,000 Hz polling, programmable buttons |
| Professional trackball | $30-$120 | 3-6 years | Fixed body, thumb or finger ball |
Those price and lifespan ranges are typical consumer-market figures, not grammar rules or universal product guarantees. Switch wear, battery replacement, cable strain, sensor quality, cleaning, and daily click volume affect actual service life.
The phrase gaming mice is standard product English. A manufacturer may choose gaming mouses in a controlled technical catalog, but the product category does not require that form.
What Should You Write in School, Work, or Publishing?
Use mice in school assignments, formal correspondence, general journalism, and most public-facing content. Use mouses only when the publication’s established technical terminology calls for it or when the device meaning must be explicitly separated from the animal meaning.
| Writing situation | Best default | Suggested example |
|---|---|---|
| School essay about rodents | Mice | “Mice adapt to many environments.” |
| Biology report | Mice | “The mice were observed for seven days.” |
| Consumer product page | Mice | “These mice support Bluetooth.” |
| Software manual | Existing house style | “The driver supports two mice.” |
| Hardware engineering specification | Mice or mouses | “The controller accepts four mouses.” |
| Mixed animal and technology article | Rewrite for clarity | “The experiment used rodents and computer devices.” |
The Associated Press Stylebook and other editorial resources generally favor familiar, conventional wording, but no single style authority controls every technical field. A publisher may prefer mice, while an engineering team may prefer mouses for a device taxonomy.
A useful practitioner rule is to define the terminology once: “The software supports multiple computer mice, called mouses in the API documentation.” After that definition, follow the chosen convention without switching.
What Are the Most Common Mistakes?
The most common mistake is using mices instead of mice. The second is assuming mouses is always ungrammatical, even though dictionaries and technical usage accept it for computer devices.
Mistake 1: Writing Mices
Incorrect: “The researcher counted five mices.”
Correct: “The researcher counted five mice.”
The irregular plural already carries the required number. Do not attach -s.
Mistake 2: Using Mouses for Animals
Incorrect in standard biological writing: “The shelter received six mouses.”
Correct: “The shelter received six mice.”
Mouses is generally limited to the computer-device sense.
Mistake 3: Changing Mouse in Compounds
Incorrect: “The user replaced two mice buttons.”
Correct: “The user replaced two mouse buttons.”
The main plural noun is buttons. The modifier mouse remains singular.
Mistake 4: Mixing Device Plurals
Inconsistent: “The application detects three mice and stores settings for connected mouses.”
Better: “The application detects three mice and stores settings for connected mice.”
Choose one device plural unless the distinction is deliberate and documented.
Mistake 5: Treating Spellcheck as the Authority
A red underline does not prove that mouses is impossible. Check the relevant dictionary, style guide, or product terminology, then add the accepted technical word to the custom dictionary if necessary.
FAQ
Is the plural of a computer mouse always mice?
No. Mice is the normal and safest plural, but mouses is also accepted for computer devices in some dictionaries and technical publications. General readers usually expect mice, whereas a software or hardware organization may select mouses to create a regular device-specific term.
What is the plural of a wireless mouse?
The usual plural is wireless mice. The adjective wireless does not affect the noun’s inflection. Wireless mouses is possible in a technical house style, but it is less familiar and should not be mixed with wireless mice in the same document.
Is “two mouses” ever correct?
Yes, two mouses can be correct when mouse means two computer devices and the writer follows a technical convention that uses the regular plural. Two mice is more widely accepted, so it is the safer choice for general audiences, formal schoolwork, and public-facing copy.
Is “mice” singular or plural?
Mice is plural. The singular form is mouse. Write “one mouse,” “two mice,” “the mouse moves,” and “the mice move.” The verb changes with number: singular moves, plural move.
What is the plural of a mouse in scientific research?
The plural is mice. Scientific writing uses terms such as laboratory mice, inbred mice, transgenic mice, and experimental mice. A species name or strain designation may supply additional precision, but none changes the standard plural.
Is mouse pluralized differently in British and American English?
Both British and American English commonly use mice for animals and computer devices. Mouses appears in technical usage on both sides of the Atlantic, but its acceptance depends more on dictionary and house-style preference than on a simple national distinction.
The Bottom Line
The answer to whats the plural of mouse is mice in standard English. Use mice for rodents and as the default plural for computer devices; reserve mouses for a consistent technical convention that specifically treats computer hardware as a separate noun. Never use mices, and keep compound terms such as mouse buttons singular in their modifier.
