Archipterygium

• (n.) The primitive form of fin, like that of Ceratodus.
Found on http://thinkexist.com/dictionary/meaning/archipterygium/

Archipterygium

Ar·chip`te·ryg'i·um (är*kĭp`te*rĭj'ĭ*ŭm) noun [ New Latin , from Greek prefix 'archi- (E. arch- ) + ptery`gion wing, fin.] (Anat.) The primitive form of fin, like that of Ceratodus.
Found on http://www.encyclo.co.uk/webster/A/116
No exact match found