'Crossopterygian' definitions:
Definition of 'crossopterygian'
From: WordNet
noun
Any fish of the order Crossopterygii; most known only in fossil form [syn: crossopterygian, lobefin, lobe- finned fish]
Definition of 'Crossopterygian'
From: GCIDE
- Crossopterygian \Cros*sop`ter*yg"i*an\ (kr?s-s?p`t?r-?j?-an), a. (Zool.) Of or pertaining to the Crossopterygii. -- n. One of the Crossopterygii. [1913 Webster]