Word.ws English Dictionary

Plural of apex

irregular plural

The plural of apex is apices or apexes.

Forms of apex

Singularapex /ˈeɪ.pɛks/
Pluralapices /ˈeɪ.pɪˌsiːz/
apexes
Countablecountable

Apices and apexes in a sentence

  • From the ventral apices of the two lateral cartilages, the two inframedian radular tensors run upwards and slightly forwards.1964, Emile S. Demian, The Anatomy of the Alimentary System of Marisa Cornuarietis (L.), page 39. From the entry inframedian
  • There are many domicolous species which spin tubes or cradles from a web emitted from the apices of four of the 14 main legs.2012, C.W. Hart, Pollution Ecology of Estuarine Invertebrates, page 347. From the entry domicolous
  • Flowers of the African hyacinth genus Albuca (slime lilies) have long intrigued plant reproductive biologists on account of their tightly closed inner tepals with apices covered in papillae.2012 August 1, SD Johnson, “Pollination function transferred: modified tepals of Albuca (Hyacinthaceae) serve as secondary stigmas”, in…. From the entry slime lily
  • The anthomyiid oviscapt (postabdomen) is as regards the ground plan undoubtedly slender, well set off from and hardly shorter than the preabdomen, and has slender cerci with projecting, cylindrical apices.2013, Verner Michelsen, “Proposal of Karliella gen. n. for the Afrotropical ‘Pegomya’ sexpunctata Karl, 1935 (Diptera: Anthomyiidae), a…. From the entry postabdomen
  • It is established that graupels and hailstones are cone-shaped with rounded apexes and that they become egg-shaped as a result of growth during descent.1951 September 15, Donald G. Yerg, “Tikhomirov, E., On the Shape of Graupels and Hailstones (O Forme Krupy i Grada). Meteorologiia i…. From the entry graupel

Meaning of apex

  1. noun The highest or the greatest part of something, especially forming a point.
  2. noun The highest point in a plane or solid figure, relative to a base line or plane.
  3. noun The lowest part of the human heart.

Full definition of apex

Nouns ending in -ex: plural -ices

Questions about the plural of apex

What is the plural of apex?
The plural of apex is apices or apexes.
Which is correct, apices or apexes?
Both are used. apices is the more common of the two in English writing.
Is apex countable?
Apex is a countable noun.

Source and license

Adapted from Wiktionary: apex (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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Cite this page: “Plural of apex.” Word.ws, https://word.ws/plural/apex. Based on Wiktionary, CC BY-SA 4.0.