Etymology
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equi-

before vowels equ-, word-forming element meaning "equal, having equal," from Latin aequi-, combining form of aequus "equal, even" (see equal (adj.)).

Entries linking to equi-

equal (adj.)
late 14c., "identical in amount, extent, or portion;" early 15c., "even or smooth of surface," from Latin aequalis "uniform, identical, equal," from aequus "level, even, flat; as tall as, on a level with; friendly, kind, just, fair, equitable, impartial; proportionate; calm, tranquil," which is of unknown origin. Parallel formation egal (from Old French egal) was in use late 14c.-17c. Equal rights is from 1752; by 1854 in American English in reference to men and women. Equal opportunity (adj.) in terms of hiring, etc. is recorded by 1925.
equiangular (adj.)
1650s; see equi- + angular. French équiangle is from 16c.
iso- 
before vowels often is-, word-forming element meaning "equal, similar, identical; isometric," from Greek isos "equal to, the same as; equally divided; fair, impartial (of persons); even, level (of ground)," as in isometor "like one's mother." In English used properly only with words of Greek origin; the Latin equivalent is equi- (see equi-).

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Dictionary entries near equi-

equation

equator

equatorial

equerry

equestrian

equi-

equiangular

equidistant

equilateral

equilibrium

equine

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