/koh see"keuhnt, -kant/ , n. Trigonom.
1. (in a right triangle) the ratio of the hypotenuse to the side opposite a given angle.
2. the secant of the complement, or the reciprocal of the sine, of a given angle or arc. Abbr.: csc
Also, cosec .
[ 1700-10; cosecant- (s. of cosecans ). See CO-, SECANT ]