/peuh tay"jee euhm/ , n. , pl. patagia /-jee euh/ .
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.
[ 1820-30; patagium tunic border ]