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tetrapod (n.)

"four-footed animal, quadruped," 1826, from Modern Latin tetrapodus, from Greek tetrapous "four-footed," as a noun, "four-footed animal," from tetra- "four" (from PIE root *kwetwer- "four") + pous "foot" (from PIE root *ped- "foot").

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Definitions of tetrapod from WordNet

tetrapod (n.)
a vertebrate animal having four feet or legs or leglike appendages;
From wordnet.princeton.edu