amphipneust
Webster's Unabridged Dictionary:
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Am·phip·neust
n.
(Zoöl.) One of a tribe of Amphibia, which have both lungs and gills at the same time, as the proteus and siren.
(Zoöl.) One of a tribe of Amphibia, which have both lungs and gills at the same time, as the proteus and siren.
