spruce gall aphid
- See under adelgid.
Also called spruce gall adelgid.
- any of various homopterous insects of the family Adelgidae, as Adelges abietis (spruce gall aphid) and Pineus pinifoliae (pine leaf aphid), that feed and form galls on conifers.
Origin of adelgid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018