Cotangent
Pronunciation : Co*tan"gent (k-tn"jent)
Part of Speech : n.
Etymology : [For co. tangens, an abbrev. of L. complementi tangens. See Tangent.] (Trig.)
Definition : Defn: The tangent of the complement of an arc or angle. See Illust. of Functions.
Source : Webster's Unabridged Dictionary, 1913