Meaning of patagium

pa•ta•gi•um

Pronunciation: (pu-tā'jē-um), [key]
— pl. -gi•a
  1. a wing membrane, as of a bat.
  2. the extensible fold of skin of certain insects or of a gliding mammal or reptile, as a flying squirrel.
  3. either of two small processes on the anterior thorax, found esp. among butterflies and moths.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.