batwing

The wing of a bat, or its shape.

The junk was nearer, beating in toward the island, her brown batwing sail suddenly tall and terribly conspicuous against the sky.

His batwings were somehow more frightening for being the pathetic broken floundering things they were than if they had been strong, muscular beaters of the air.

Several South or Southeast Asian species of tailless dark swallowtail butterflies in the genus Atrophaneura.

An area of flabby fat under a person's arms.

A long sleeve with a deep armhole, tapering toward the wrist.

One of a pair of swinging doors which typically do not lock nor cover the full vertical range of the doorway (leaving a large gap at the top and bottom), common especially in saloons.

The cantina was a flatroofed adobe, painfully white in the unrelenting sun, with a brush roof and splintery batwings. The doors swung back and forth as a man stepped before them and stood beneath the brush arbor, staring at Navarro,[…]

He made it to the saloon undetected and slipped under the batwing and over to the table where he had left his saddlebags. They weren't there. Fargo ran his hands over the top of the table to be sure, and swore.