What is "cabbage butterfly"

cabbage butterfly \cab"bage butterfly\ (Zo["o]l.), a white butterfly ( Pieris rap[ae] of both Europe and America, and the allied Pieris oleracea, a native American species) which, in the larval state, devours the leaves of the cabbage and the turnip. See also Cabbage worm, below.

n : white butterfly whose larvae (cabbageworms) feed on cabbage