Pronunciation: (pu-tā'jē-um), [key]
—pl. -gi•aPronunciation: (-jē-u). [key]
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.