Definition of COSEC

  • cosecant (a trigonometric function of an angle) [n COSECS]
  • a trigonometrical function of an angle, also COSECANT [n -S]
  • (in a right triangle) the ratio of the hypotenuse to the side opposite a given angle
  • the secant of the complement, or the reciprocal of the sine, of a given angle or arc