the reciprocal of the sine ; specif.
the ratio of the hypotenuse to the opposite side of a given acute
angle in a right
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'cosecant'Fr cosécante, for co. secans, short for ModL complementi secans, lit., secant of the complement