equilateral

[ ee-kwuh-lat-er-uh l, ek-wuh- ]
/ ˌi kwəˈlæt ər əl, ˌɛk wə- /

adjective

having all the sides equal: an equilateral triangle.

noun

a figure having all its sides equal.
a side equivalent, or equal, to others.

QUIZZES

TAKE THIS QUIZ TO SEE WHAT YOU KNOW ABOUT HIGH SCHOOL PUNCTUATION!

Commas mark divisions in sentences. Periods end declarative sentences. Apostrophes show possession. Easy, right? Well, punctuation can get pretty tricky—fast. Think you got what it takes to be a punctuation expert? Take our quiz to prove it!
Question 1 of 10
Which of the options below is the best punctuation for the sentence? It__s your turn to pick the movie __ but your sister gets to pick the board game we _ re going to play.

Origin of equilateral

From the Late Latin word aequilaterālis, dating back to 1560–70. See equi-, lateral

OTHER WORDS FROM equilateral

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for equilateral

British Dictionary definitions for equilateral

equilateral
/ (ˌiːkwɪˈlætərəl) /

adjective

having all sides of equal lengthan equilateral triangle

noun

a geometric figure having all its sides of equal length
a side that is equal in length to other sides

Derived forms of equilateral

equilaterally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for equilateral

equilateral
[ ē′kwə-lătər-əl ]

Having all sides of equal length, as a triangle that is neither scalene nor isosceles.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.