Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of crossopterygian is as below...

Polypteroidei :: Polypteroidei (n. pl.) A suborder of existing ganoid fishes having numerous fins along the back. The bichir, or Polypterus, is the type. See Illust. under Crossopterygian..

Crossopterygian :: Crossopterygian (n.) One of the Crossopterygii.

Crossopterygian :: Crossopterygian (a.) Of or pertaining to the Crossopterygii.

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