cosecantPronunciation: /kəʊˈsiːk(ə)nt, -ˈsɛk-/Definition of cosecant noun Mathematics the ratio of the hypotenuse (in a right-angled triangle) to the side opposite an acute angle; the reciprocal of sine. Origin: early 18th century: from modern Latin cosecant-, from co- 'mutually' + Latin secant- 'cutting' (from the verb secare). Compare with secantcosecant in other Oxford dictionaries Definition of cosecant in the US English dictionary
