What is "gallfly"

Gallfly \Gall"fly`\, n.; pl. Gallflies. (Zo["o]l.) An insect that deposits its eggs in plants, and occasions galls, esp. any small hymenopteran of the genus Cynips and allied genera. See Illust. of Gall.

n. Any of various fly which produce galls.

1. n. small solitary wasp that produces galls on oaks and other plants [syn: gall wasp, cynipid wasp, cynipid gall wasp]

2. fragile mosquito-like flies that produce galls on plants [syn: gall midge, gall gnat]

3. any of various insects that deposit their eggs in plants causing galls in which the larvae feed