Prog·ne n. Zool. (a) A swallow. (b) A genus of swallows including the purple martin. See Martin. (c) An American butterfly (Polygonia Progne syn. Vanessa Progne). It is orange and black above, grayish beneath, with an L-shaped silver mark on the hind wings. Called also gray comma.
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Progne
n : a genus of Hirundinidae [syn: genus Progne]