Definition of plethodon
1 capitalized : the type genus of Plethodontidae comprising New World terrestrial salamanders that lay large yolk-filled eggs and do not pass through an aquatic larval period — see red-backed salamander
2 plural -s : a salamander of the genus Plethodon
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Origin and Etymology of plethodon
New Latin pleth- (from Greek plēthos mass, magnitude, from plēthein to be full) + -odon
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