Source : Webster's Revised Unabridged Dictionary (1913)

Cheiropterygium \Chei*rop`te*ryg"i*um\, n.; pl.
   {Cheiropterygia}. [NL., fr. Gr. ? hand + ?; ? wing, fin.]
   (Anat.)
   The typical pentadactyloid limb of the higher vertebrates.