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Noun: crossopterygian  ,kró,sóp-tu'ri-jee-un
  1. Any fish of the order Crossopterygii; most known only in fossil form
    - lobefin, lobe-finned fish

Derived forms: crossopterygians

Type of: bony fish

Part of: Crossopterygii, subclass Crossopterygii

Encyclopedia: Crossopterygian