Hypertext Webster Gateway: "Archipterygium"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Archipterygium \Ar*chip`te*ryg"i*um\
([aum]r*k[i^]p`t[-e]*r[i^]j"[i^]*[u^]m), n. [NL., fr. Gr.
pref. 'archi- (E. arch-) + ptery`gion wing, fin.] (Anat.)
The primitive form of fin, like that of Ceratodus.
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