Source : Webster's Revised Unabridged Dictionary (1913)

Equant \E"quant\, n. [L. aequans, -antis, p. pr. of aequare: cf.
   F. ['e]quant. See {Equate}.] (Ptolemaic Astron.)
   A circle around whose circumference a planet or the center of
   ann epicycle was conceived to move uniformly; -- called also
   {eccentric equator}.