platypus
noun
°An egg-laying, semi-aquatic mammal with a bill resembling that of a duck, that has a mole-like body, a tail resembling that of a beaver, a waterproof pelt, and flat webbed feet — males have poisonous spurs on the inside of the back legs; Ornithorhynchus anatinus.
synonyms: duck-billed platypus, duckbill, duckmole, watermole