patagium

詳細解釋：

pa.ta.gi.um

n.（名詞）
【複數】 pa.ta.gi.a[-jô-…]
A thin membrane extending between the body and a limb to form a wing or winglike extension, as in bats and flying squirrels.Also called parachute
翼膜：肢體和軀幹間的一種薄膜，形成一翼或似翼的伸展部分，如蝙蝠和飛行松鼠的皮膚褶也作 parachute
An expandable, membranous fold of skin between the wing and body of a bird.
翅翼：鳥翼和軀幹間的一種可伸展開的皮膚褶

來源：
Latin patagium [gold edging on a woman`s tunic]
拉丁語 patagium [婦女束腰的金邊]
perhaps from Greek *patageion
可能源自 希臘語 *patageion
from patagos [clatter]
源自 patagos [噼啪聲]
of imitative origin
擬聲語源

【引伸】
pata.gial