cockatrice
noun
cock·a·trice ˈkä-kə-trəs 
-ˌtrīs
: a legendary serpent that is hatched by a reptile from a cock's egg and that has a deadly glance
Example Sentences
Recent Examples on the Web That means dragons, cockatrices, slimes and more gross stuff. 
Soleil Ho, SFChronicle.com, 20 Jan. 2020
Soleil Ho, SFChronicle.com, 20 Jan. 2020 Word History
Etymology
Middle English cocatrice, from Middle French cocatris ichneumon, cockatrice, from Medieval Latin cocatric-, cocatrix ichneumon
First Known Use
14th century, in the meaning defined above