equilateral

About 0.45 uses per million words.

Meaning

1. adjective Having all the sides equal.
2. adjective Having all the faces equal.
3. adjective Having the two sides equal, as a surface divisible by a longitudinal median line into two halves of the same form.
4. adjective Having all the convolutions of the shell in one plane, chiefly of foraminifers.
5. noun A side exactly corresponding, or equal, to others.
6. noun A figure having all its sides equal.

Similar words

equal regular equiangular equangular equiregular equifacial isosceles equiangle equiangled isogonic

Often followed by

triangle triangles triangular and hyperbola or polygon rectangle cross