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cockatrice

noun
cock·​a·​trice | \ ˈkä-kə-trəs, -ˌtrīs\

Definition of cockatrice 

: a legendary serpent that is hatched by a reptile from a cock's egg and that has a deadly glance

First Known Use of cockatrice

14th century, in the meaning defined above

History and Etymology for cockatrice

Middle English cocatrice, from Middle French cocatris ichneumon, cockatrice, from Medieval Latin cocatric-, cocatrix ichneumon

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The first known use of cockatrice was in the 14th century

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