cockatrice
Concise Oxford English Dictionary © 2008 Oxford University Press:
cockatrice /ˈkɒkətrʌɪs, -trɪs/
▶noun another term for basilisk (sense 1).
■ Heraldry a mythical animal depicted as a two-legged dragon (or wyvern) with a cock's head.
– origin ME: from OFr. cocatris, from L. calcatrix ‘tracker’, translating Gk ikhneumōn (see ichneumon).
'cockatrice' also found in these Oxford entries:

