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spruce gall aphid

noun
1.
See under adelgid.
Also called spruce gall adelgid.

adelgid

[uh-del-jid] /əˈdɛl dʒɪd/
noun
1.
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
< Neo-Latin Adelgidae, equivalent to Adelg(es) a genus name (apparently < Greek ádel(os) unseen, invisible (a- a-6 + dêlos visible, clear) + Neo-Latin -ges < ?: unexplained by the name's originator) + -idae -id2
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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