- a greenish aphid commonly occurring as a pest on garden and crop plants
WordReference Random House Unabridged Dictionary of American English © 2026
green•fly
(grēn′flī′),USA pronunciation n., pl. -flies.
- Insectsan aphid, Coloradoa rufomaculata, that is an important pest of chrysanthemums. Also called pale chrysanthemum aphid.
- green + fly2 1680–90
Collins Concise English Dictionary © HarperCollins Publishers::
greenfly /ˈɡriːnˌflaɪ/ n ( pl -flies)
'greenfly' also found in these entries (note: many are not synonyms or translations):