crossopterygian

/K R AA1 S AH0 P T EH0 R IH1 JH IY0 AH0 N/
noun
  1. 1

    One of the Crossopterygii.

adjective
  1. 1

    Of or pertaining to the Crossopterygii, an infraclass of bony fish.

Source: https://en.wiktionary.org/wiki/crossopterygian