Meaning of crossopterygian

cros•sop•te•ryg•i•an

Pronunciation: (kro-sop"tu-rij'ē-un), [key]
— n.
  1. any fish of the group Crossopterygii, extinct except for the coelacanth, regarded as being ancestral to amphibians and other land vertebrates.
—adj.
  1. pertaining to or resembling a crossopterygian.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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