Definitions for: Cotangent

[n] ratio of the adjacent to the opposite side of a right-angled triangle

Webster (1913) Definition: Co*tan"gent (k?-t?n"jent), n. [For co. tangens, an
abbrev. of L. complementi tangens. See Tangent.] (Trig.)
The tangent of the complement of an arc or angle. See Illust.
of Functions.

Synonyms: cotan

See Also: circular function, trigonometric function