e·qui·lat·er·al

[ee-kwuh-lat-er-uhl, ek-wuh-]
adjective
1.
having all the sides equal: an equilateral triangle.
noun
2.
a figure having all its sides equal.
3.
a side equivalent, or equal, to others.

Origin:
1560–70; < Late Latin aequilaterālis. See equi-, lateral

e·qui·lat·er·al·ly, adverb
non·e·qui·lat·er·al, adjective
non·e·qui·lat·er·al·ly, adverb
sub·e·qui·lat·er·al, adjective
un·e·qui·lat·er·al, adjective
un·e·qui·lat·er·al·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To equilateral
00:10
Equilateral is always a great word to know.
So is lollapalooza. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
Collins
World English Dictionary
equilateral (ˌiːkwɪˈlætərəl) [Click for IPA pronunciation guide]
 
adj
1.  having all sides of equal length: an equilateral triangle
 
n
2.  a geometric figure having all its sides of equal length
3.  a side that is equal in length to other sides
 
equi'laterally
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

equilateral
1560s, from L.L. aequilateralis, from aequi- (see equal) + lateralis (see lateral).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
equilateral   (ē'kwə-lāt'ər-əl)  Pronunciation Key 
Having all sides of equal length, as a triangle that is neither scalene nor isosceles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
In the other activity a ball rests in the middle of an equilateral triangle.
At the apex, that is, of an equilateral triangle formed by you and your two
  speakers.
Then add two counters to form an equilateral triangle as shown.
Three toothpicks together makes an equilateral triangle.
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