/truy ser"euh tops'/ , n.
any of various dinosaurs of the genus Triceratops, of the late Cretaceous Period, having a bony crest on the neck, a long horn over each eye, and a shorter horn on the nose.
[ 1890-95; trikérat ( os ) three-horned (see TRI-, CERAT-), + óps face, EYE ]