equilateral
adjective, noun
Forms equilaterals æquilateral
- adjective (geometry, of a polygon) Having all the sides equal.
- adjective (geometry, of a polyhedron) Having all the faces equal.
- adjective (zoology) Having the two sides equal, as a surface divisible by a longitudinal median line into two halves of the same form.
- adjective (zoology) Having all the convolutions of the shell in one plane, chiefly of foraminifers.
- noun A side exactly corresponding, or equal, to others.
- noun A figure having all its sides equal.
Etymology
L. aequilateralis; aequus equal + latus, lateris, side: cf. F. équilatéral.
Webster’s 1913
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “equilateral”, CC BY-SA 4.0. Details