E″quant (?), n. [L. aequans, -antis, p. pr. of aequare: cf. F. équant. 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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.