Having two points, fangs, or cusps.
Specifically applied — In geometry, to a curve having two cusps, In human anatomy, to the premolar teeth or false molars, of which there are two on each side above and below, replacing the milk-molars; to the mitral valve guarding the left auriculoventricular orifice of the heart, the corresponding right orifice being guarded by the tricuspid valve, In entomology, to a claw or mandible having two pointed processes or teeth. Also bicuspidal, bicuspidate.
noun.
One of the premolars or false molars in man, of which there are in the adult two on each side, above and below, between the canines and the true molars. They are the teeth which succeed and replace the milk-molars of the child. Also bicuspis.