whats the plural of apex

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When discussing the plural form of the word **apex**, there is often confusion because the word has roots in Latin. Depending on the context—whether you are writing a scientific paper, a mathematical proof, or a casual blog post—the “correct” plural may change.

The Primary Plural Forms: Apexes vs. Apices

The word apex has two recognized plural forms:

1. Apexes: This is the anglicized plural. It follows the standard English rule of adding “-es” to words ending in “x.”
2. Apices: This is the classical Latin plural. It follows the Latin rule where the suffix “-ex” changes to “-ices.”

Etymology and Linguistic Roots

The word apex comes directly from Latin, meaning “summit,” “tip,” or “peak.” In Latin, third-declension nouns ending in -ex (like index, vortex, or appendix) typically form their plurals by changing the ending to -ices.

When to Use Each Form

Choosing between apexes and apices usually depends on your audience and the subject matter:

1. Scientific and Mathematical Contexts

In botany, anatomy, and geometry, apices is the standard. For example, a botanist might refer to the “apices of the leaves,” or a dentist might discuss the “apices of the tooth roots.”

2. General and Literary Contexts

In everyday conversation, sports, or business, apexes is much more natural. Referring to the “apexes of the mountains” or “market apexes” sounds less formal and more accessible to the average reader.

Examples in Sentences

Frequently Asked Questions

Is “apixes” a word?

No, apixes is an incorrect spelling. The only two valid plurals are apexes and apices.

How do you pronounce “apices”?

The pronunciation of apices is usually “AY-pi-seez” (long ‘a’ and long ‘e’ at the end). This differs significantly from the pronunciation of apexes (“AY-pex-iz”).