crossopterygian

== English == === Etymology === From Crossopterygia +‎ -an, Greek krossoí “tassels, fringe” + -o- + pterýgion “little wing or fin,” equivalent to pteryg- (stem of pterýx) “wing, fin” + -ion + -an. === Adjective === crossopterygian (not comparable) (zoology) Of or pertaining to the Crossopterygii, an infraclass of bony fish. [from 19th c.] === Noun === crossopterygian (plural crossopterygians) (zoology) One of the Crossopterygii.