An order of amphibians that includes all frogs and toads, characterized by lacking tails as adults.
From Greek 'a-' (without) plus 'oura' (tail); literally 'without a tail', describing the defining characteristic of this amphibian group.
Frogs and toads didn't always lack tails—their tadpole ancestors had them, but they lose them during metamorphosis in one of nature's most dramatic transformations, going from a fish-like creature to a hopping insect-eater.
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