Definition of patagium

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Patagonia >

pa·ta·gi·um    (p-tj-m) KEY 

NOUN:
pl. pa·ta·gi·a  (-j-) KEY 

1. A thin membrane extending between the body and a limb to form a wing or winglike extension, as in bats and flying squirrels.
2. An expandable membranous fold of skin between the wing and body of a bird.

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ETYMOLOGY:
Latin patagium, gold edging on a woman's tunic, perhaps from Greek *patageion, from patagos, clatter, of imitative origin

OTHER FORMS:
pa·tagi·al  (-j-l) KEY (Adjective)