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See also: Apex, APEX, ápex, and àpex


English Wikipedia has an article on:


Borrowed from Latin apex (point, tip, summit).


  • IPA(key): /ˈeɪ.pɛks/
  • (file)
  • Rhymes: -eɪpɛks


apex (plural apices or apexes)

  1. The highest or the greatest part of something, especially forming a point.
    the apex of the building
    Synonyms: peak, top, summit, vertex
    1. (geometry) The highest point in a plane or solid figure, relative to a base line or plane.
    2. (chiefly anatomy) The pointed fine end of something.
      1. The lowest part of the human heart.
      2. The deepest part of a tooth's root.
      3. Synonyms: end, tip
    3. (botany) The end of a leaf, petal or similar organ opposed to the end where it is attached to its support.
      Synonym: tip
    4. (botany) The growing point of a shoot.
    5. (astronomy) The point on the celestial sphere toward which the Sun appears to move relative to nearby stars.
      Hyponym: solar apex
    6. (physics) The lowest point on a pendant drop of a liquid.
    7. (mining, US) The end or edge of a vein nearest the surface.
    8. (typography):
      1. A diacritic in Classical Latin that resembles and gave rise to the acute.
      2. A diacritic in Middle Vietnamese that indicates /ŋ͡m/.
      3. A sharp upward point formed by two strokes that meet at an acute angle, as in "W", uppercase "A", and closed-top "4", or by a tapered stroke, as in lowercase "t".
        Coordinate term: vertex
  2. (figuratively) The moment of greatest success, expansion, etc.
    the apex of civilization
    Synonyms: acme, culmination, height, peak, pinnacle
  3. (attributive, ecology) The top of the food chain.
  4. A conical priest cap.


Derived terms[edit]

Related terms[edit]




Latin Wikipedia has an article on:
Wikipedia la


From Proto-Indo-European *h₂ep- (to join, fit). Cognate with Latin apō (to fasten, join, tie to).



apex m (genitive apicis); third declension

  1. The extreme end of a thing; the point, summit, top.
    Synonyms: cacūmen, summa, fastīgium, culmen, vertex
  2. (literally) The small rod at the top of the flamen's cap, wound around with wool.
  3. (transferred sense):
    1. The conical cap of a priest (the flamen), ornamented with this rod.
    2. Any hat or helmet; a crown.
    3. (literally) A projecting point or summit.
      1. (figuratively) The highest ornament or honor; the crown of a thing.
    4. (grammar) The macron (long mark over a vowel).
      1. The forms or outlines of the letters.
    5. A letter or any other writing.
    6. (Ecclesiastical Latin, figuratively) (of the point or apex of a Hebrew letter) The least particle, tittle.


Third-declension noun.

Case Singular Plural
Nominative apex apicēs
Genitive apicis apicum
Dative apicī apicibus
Accusative apicem apicēs
Ablative apice apicibus
Vocative apex apicēs



  • apex”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • apex”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • apex in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • apex in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
  • apex”, in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • apex”, in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin



From Latin apex.


apex n (plural apexuri)

  1. apex