from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A thin membrane extending between the body and a limb to form a wing or winglike extension, as in bats and flying squirrels.
- n. An expandable membranous fold of skin between the wing and body of a bird.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The thin membrane that extends between the limbs and body of a bat or of gliding mammals
- n. A similar membrane between the body and wing of a bird
from the GNU version of the Collaborative International Dictionary of English
- n. In bats, an expansion of the integument uniting the fore limb with the body and extending between the elongated fingers to form the wing; in birds, the similar fold of integument uniting the fore limb with the body.
- n. One of a pair of small vesicular organs situated at the bases of the anterior wings of lepidopterous insects. See Illust. of Butterfly.
from The Century Dictionary and Cyclopedia
- n. In zoology: The extensible fold of skin of a flying mammal or reptile; the expansion of the integument of the trunk and limbs or tail, or both of these, by which bats, flying-lemurs, flying-squirrels, flying-opossums, and flying-lizards support themselves in the air.
- n. The fold of integument which occupies the reëntrant angle between the upper arm and the forearm of a bird, bringing the fore border of the wing to a smooth straightish free edge when the wing is closed. The tensor patagii is a muscle which puts this patagium upon the stretch.
- n. In entomology, one of a pair of chitinous scales affixed to the sides of the pronotum of lepidopterous insects, just behind the head, usually covered with long scales or hairs; a shoulder-tippet. Compare tegula.
Latin patagium, gold edging on a woman's tunic, perhaps from Greek *patageion, from patagos, clatter, of imitative origin .(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin patagīum ("gilded edging of a woman's tunic"), from Ancient Greek παταγεῖον. (Wiktionary)