minotaur

from WordNet (r) 3.0 (2006)

Minotaur
    n 1: (Greek mythology) a mythical monster with the head of a
         bull and the body of a man; slain by Theseus

from The Collaborative International Dictionary of English v.0.48

Minotaur \Min"o*taur\ (m[i^]n"[-o]*t[add]r), n. [L. Minotaurus,
   Gr. Minw`tayros; Mi`nos, the husband of Pasiphae + tay^ros a
   bull, the Minotaur being the offspring of Pasiphae and a
   bull: cf. F. minotaure.] (Class. Myth.)
   A fabled monster, half man and half bull, confined in the
   labyrinth constructed by Daedalus in Crete.
   [1913 Webster]