Definition from Wiktionary, the free dictionary
cockatrice (plural cockatrices)
- A legendary creature about the size and shape of a dragon or wyvern, but in appearance resembling a giant rooster, with some lizard-like characteristics.
- (heraldry) A heraldic representation of such a beast used as a charge or as a supporter.
- (obsolete) Mistress, harlot
- For meaning "mistress": 1949, John Dover Wilson (compiler), Life in Shakespeare's England. A Book of Elizabethan Prose, Cambridge at the University Press. 1st ed. 1911, 2nd ed. 1913, 8th reprint. In Glossary and Notes