Definition of ichthyopterygium
: the vertebrate limb when having the form of a fin whether as a definitive organ or in the course of individual or evolutionary development; especially : any of the paired fins that are the typical limbs of fishes — compare chiropterygium
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Origin and Etymology of ichthyopterygium
New Latin, from ichthy- + Greek pterygion small wing, fin, diminutive of pteryg-, pteryx wing
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