Source : Webster's Revised Unabridged Dictionary (1913)

Malacopterygian \Mal`a*cop`ter*yg"i*an\, n. [Cf. F.
   malacopt['e]rygien.] (Zo["o]l.)
   One of the Malacopterygii.

Source : WordNet®

malacopterygian
     n : any fish of the superorder Malacopterygii [syn: {soft-finned
         fish}] [ant: {spiny-finned fish}]