gallfly

[ gawl-flahy ]
/ ˈgɔlˌflaɪ /

noun, plural gall·flies.

any of various insects that deposit their eggs in plants, causing the formation of galls.

Origin of gallfly

First recorded in 1815–25; gall3 + fly2

British Dictionary definitions for gallfly

gallfly
/ (ˈɡɔːlˌflaɪ) /

noun plural -flies

any of several small insects that produce galls in plant tissues, such as the gall wasp and gall midge