adjective sar·cop·te·ryg·ian \ˌsär-ˌkäp-tə-ˈri-j(ē-)ən\

Definition of sarcopterygian

  1. :  of, relating to, or belonging to the Sarcopterygii :  lobe-finned [The coelacanth] is the only living representative of a group of sarcopterygian fishes thought to be extinct since the Late Cretaceous period … — Kim Honey, Globe and Mail (Toronto), 18 Jan. 1999 … supporting the hypothesis that the neural basis of vocal circuits arose before the divergence of sarcopterygian and actinopterygian branches of the vertebrate phylogeny. — Daniel Margoliash and Melina E. Hale, Science, 18 July 2008


noun, plural


Lobe-finned fish like the coelacanth and lungfish are known to zoologists as sarcopterygians, meaning fleshy fins. Tetrapods, including people, are descended from this group … — Nicolas Wade, New York Times, 18 Apr. 2013

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First Known Use of sarcopterygian


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