Patagium /(?)/

Pa·ta·gi·um

Patagium

n.

pl. Patagia

  1. 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. (Anat.)
  2. One of a pair of small vesicular organs situated at the bases of the anterior wings of lepidopterous insects. See Illust. of Butterfly. (Zool.)