Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

vertex

play
noun ver·tex \ˈvər-ˌteks\

Simple Definition of vertex

  • : a point where two lines meet to form an angle; especially : the point on a triangle that is opposite to the base

Full Definition of vertex

plural ver·ti·ces play \ˈvər-tə-ˌsēz\ also ver·tex·es

  1. 1 :  the top of the head

  2. 2 a :  the point opposite to and farthest from the base in a figure b :  a point (as of an angle, polygon, polyhedron, graph, or network) that terminates a line or curve or comprises the intersection of two or more lines or curves c :  a point where an axis of an ellipse, parabola, or hyperbola intersects the curve itself

  3. 3 :  a principal or highest point :  summit <the vertex of the hill>

Origin of vertex

Middle English, top of the head, from Latin vertic-, vertex, vortic-, vortex whirl, whirlpool, top of the head, summit, from vertere to turn


First Known Use: 14th century

Other Mathematics and Statistics Terms


VERTEX Defined for Kids

vertex

play
noun ver·tex \ˈvər-ˌteks\

Definition of vertex

plural ver·ti·ces \ˈvər-tə-ˌsēz\ also ver·tex·es

  1. 1 :  the point opposite to and farthest from the base of a geometrical figure

  2. 2 :  the common endpoint of the sides of an angle




Medical Dictionary

vertex

play
noun ver·tex \ˈvər-ˌteks\

Medical Definition of vertex

plural ver·ti·ces \ˈvərt-ə-ˌsēz\play also ver·tex·es

  1. 1:  the top of the head

  2. 2:  the highest point of the skull





Seen and Heard

What made you want to look up vertex? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

pince-nez spindrift kittly-benders duvet
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ