1650s; see equi- + angular. French équiangle is from 16c.
Entries linking to equiangular
equi-
before vowels equ-, word-forming element meaning "equal, having equal," from Latin aequi-, combining form of aequus "equal, even" (see equal (adj.)).
angular adj.
1590s, "having an angle or angles, pointy," from Latin angularis "having corners or angles," from angulus "angle, corner" (see angle (n.)). It is attested earlier in an astrological sense, "occupying a cardinal point of the zodiac" (late 14c.). Angulous "having many corners" is from mid-15c. Angular as "measured by an angle" is from 1670s, hence angular motion "motion of a body which moves around a fixed point."