## equilateral

[ē′kwi lat**′**ər əl]

adjective

having all sides equal: an

*equilateral*triangleOrigin of equilateral

Late Latin*aequilateralis*; from Classical Latin

*aequus*(see equal) +

*latus*, side: see lateral

noun

- a figure having equal sides
- a side exactly equal to another or others

## equilateral

adjective

Having all sides or faces equal.

noun

- A side exactly equal to others.
- A geometric figure having all sides equal.

*Related Forms:*

**e′qui·lat′er·al·ly**adverb

## equilateral

Adjective

(*not comparable*)

- (geometry) Referring to a polygon all of whose sides are of equal length. Not necessarily a regular polygon since the angles can still differ (a regular polygon would also be equiangular).

Noun

(*plural* equilaterals)

- An equilateral triangle