gallfly Meaning, Definition & Usage

  1. noun small solitary wasp that produces galls on oaks and other plants
    cynipid wasp; cynipid gall wasp; gall wasp.
  2. noun fragile mosquito-like flies that produce galls on plants
    gall gnat; gall midge.
  3. noun any of various insects that deposit their eggs in plants causing galls in which the larvae feed

WordNet

Gall"fly` noun
Wordforms
plural Gallflies
Definitions
  1. (Zoöl.) 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.

Webster 1913