vertices

UK: /ˈvɜːtɪˌsiːz/ US: (vûr′tə sēz′)

From vertex (n):

vertexes

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vertices

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WordReference Random House Unabridged Dictionary of American English © 2026

ver•ti•ces  (vûr′tə sēz′), n. 

1. a pl. of vertex. 

Collins Concise English Dictionary © HarperCollins Publishers::

vertices / ˈvɜːtɪˌsiːz/ noun

1. (in technical and scientific senses only) a plural of vertex

WordReference Random House Learner's Dictionary of American English © 2026

ver•tex /ˈvɜrtɛks/   n. [countable] , pl. -tex•es, -ti•ces 

/-təˌsiz/ .
1. the highest point of something;
   apex.
2. Mathematics [Geometry.]
   • the point farthest from the base.
   • the intersection of two sides of a plane figure.

See -vert-.

WordReference Random House Unabridged Dictionary of American English © 2026

ver•tex  (vûr′teks), n., pl. -tex•es, -ti•ces 

(-tə sēz′). 
1. the highest point of something;
   apex;
   summit;
   top:
   the vertex of a mountain.
2. Anatomy, Zoology the crown or top of the head.
3. Anatomy, Physical Anthropology [Craniom.] the highest point on the midsagittal plane of the skull or head viewed from the left side when the skull or head is in the Frankfurt horizontal.
4. [Astron.] a point in the celestial sphere toward which or from which the common motion of a group of stars is directed.
5. Mathematics [Geom.]
   • the point farthest from the base:
     the vertex of a cone or of a pyramid.
   • a point in a geometrical solid common to three or more sides.
   • the intersection of two sides of a plane figure.

• Latin: a whirl, top (of the head), equivalent. to vert(ere) to turn + -ex (stem -ic-) noun, nominal suffix
• 1560–70

Collins Concise English Dictionary © HarperCollins Publishers::

vertex / ˈvɜːtɛks/ noun ( -texes, -tices / -tɪˌsiːz/)

1. the highest point
2. the point opposite the base of a figure
3. the point of intersection of two sides of a plane figure or angle
4. the point of intersection of a pencil of lines or three or more planes of a solid figure
5. the crown of the head

Etymology: 16th Century: from Latin: highest point, from vertere to turn