batwing

nouns

one of a pair of swinging doors (as at the entrance to a western saloon)

batwing

is a type of (narrower)

a door that swings on a double hinge; opens in either direction

formed or shaped like a bat's wing

"a dress with batwing sleeves"

batwing

is similar to

having wings or as if having wings of a specified kind

"the winged feet of Mercury";