A creature or object with exactly two feet or foot-like appendages.
From duo- (Latin 'two') + -pod (from Greek pous meaning 'foot'). The term applies to any biped, though it's more common in scientific or technical contexts than in everyday language.
Humans are duopods, and we're actually rare in the animal kingdom—most creatures have four legs, six, or eight, so our two-legged way of walking had to be learned by evolution, and it's one of the reasons our hands became so specialized.
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