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Definition of: hippopotamus
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(hip′ə·pot′ə·məs) noun plural ·mus·es or ·mi (-mī)
A large, amphibious, short–legged, thick–skinned African pachyderm related to the pigs (Hippopotamus amphibius), having a massive body and very broad obtuse muzzle; river horse. Among living quadrupeds it ranks next to the elephant in size. [<L <Gk. hippopotamos <hippos horse + potamos river]
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