Crossopterygian

from WordNet (r) 3.0 (2006)

crossopterygian
    n 1: any fish of the order Crossopterygii; most known only in
         fossil form [syn: {crossopterygian}, {lobefin}, {lobe-
         finned fish}]

from The Collaborative International Dictionary of English v.0.48

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]

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