Dipterygian

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Dipterygian \Dip`ter*yg"i*an\, a. [Gr. di- = di`s- twice + ? a
     fin, dim. of ? wing.] (Zool.)
     Having two dorsal fins; -- said of certain fishes.
     [1913 Webster]