'Tetrapod' definitions:

Definition of 'tetrapod'

(from WordNet)
noun
A vertebrate animal having four feet or legs or leglike appendages

Definition of 'Tetrapod'

From: GCIDE
  • Tetrapod \Tet"ra*pod\, n. [Gr. ? fourfooted; te`tra- (see Tetra-) + ?, ?, foot.] (Zool.) An insect characterized by having but four perfect legs, as certain of the butterflies. [1913 Webster]