Pronunciation: ˌ kro ̇ - ˌ säp-t ə - ' ri-j( ē -) ə n
Function: noun
Etymology: New Latin Crossopterygii, subclass name, from Greek krossoi fringe + pterygion, diminutive of pteryg-, pteryx wing, fin; akin to Greek pteron wing ― more at FEATHER
Date: 1861
: any of a subclass (Crossopterygii) of bony fishes (as a coelacanth) that have paired fins suggesting limbs, that may be ancestral to the terrestrial vertebrates, and that are mostly extinct ― called also lobe-fin
– crossopterygian adjective