Calcar

kal′kar, n. ( bot. ) a spur or spur-like projection, esp. from the base of a petal: ( an at. ) an eminence in the lateral ventricles of the brain, the hippocampus minor or calcar avis.— adjs. Cal′carate ; Calcar′iform ; Cal′carine . [L., a spur— calx , calcis , the heel.]