Definition of platypus
: a small carnivorous aquatic monotreme mammal (Ornithorhynchus anatinus) of eastern Australia and Tasmania that has a fleshy bill resembling that of a duck, dense fur, webbed feet, and a broad flattened tail
— called also duck-billed platypus
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Merriam-Webster unabridged
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Time Traveler for platypus
The first known use of platypus was in 1799
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