a combining form meaning “equal,” used in the formation of compound words: equimolecular.

Origin of equi-

Middle English < Latin aequi-, combining form representing aequus equal
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British Dictionary definitions for equi-


combining form

equal or equallyequidistant; equilateral
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for equi-


A prefix that means “equal” or “equally,” as in equidistant.
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