/sing"keuh neen', -nin, sin"-/ , n. Pharm.
a colorless, crystalline, slightly water-soluble alkaloid, C 19 H 22 N 2 O, a stereoisomer of cinchonidine, obtained from the bark of various species of cinchona and used chiefly as a quinine substitute.
[ 1815-25; CINCHON(A) + -INE 2 ]