a. [ L. trimetrus, Gr. &unr_;; &unr_; (see Tri-) + &unr_; measure. See Meter measure. ] (Pros.) Consisting of three poetical measures. --
n. [ L. trimestris of three months; tri- (see Tri-) + mensis month: cf. F. trimestre. ] A term or period of three months. [ 1913 Webster ]