equilateral
noun
Definitions
A side exactly corresponding, or equal, to others.
A figure having all its sides equal.
adjective
Definitions
(of a polygon) Having all the sides equal.
(of a polyhedron) Having all the faces equal.
Having the two sides equal, as a surface divisible by a longitudinal median line into two halves of the same form.
Having all the convolutions of the shell in one plane, chiefly of foraminifers.