ornithorhynchus

noun
or·nitho·rhyn·chus | \ ȯ(r)ˌnithəˈriŋkəs , ˌȯ(r)nəthōˈr- \

Definition of ornithorhynchus 

1 capitalized : a genus (coextensive with the family Ornithorhynchidae) of egg-laying mammals including only the platypus

2 plural -es : platypus

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History and Etymology for ornithorhynchus

New Latin, from ornith- + -rhynchus

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