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cosecant n. 余割 余割 cosecant n 1: ratio of the hypotenuse to the opposite side of a right- angled triangle [synonym: {cosecant}, {cosec}] Cosecant \Co*se"cant\ (k?-s?"k?nt), n. [For co. secans, an
abbrev. of L. complementi secans.] (Trig.) The secant of the complement of an arc or angle. See Illust. of {Functions}. [1913 Webster]
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