Ornithorhynchidae

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Ornithorhynchidae

[‚ȯr·nə·thō′riŋ·kə‚dē]
(vertebrate zoology)
A monospecific order of monotremes containing the semiaquatic platypus; characterized by a duck-billed snout, horny plates instead of teeth in the adult, and a flattened, well-developed tail.