adelgid
UK[əˈdɛldʒɪd]US[əˈdɛldʒɪd]
n
A small insect of the family Adelgidae, related to aphids, that feeds on conifers and can cause significant damage.
Etymology
The term 'adelgid' is a modern entomological coinage, derived from the genus name Adelges, which was established in the 19th century. The origin of Adelges is obscure; it is not definitively traced to Greek or Latin roots and may be an arbitrary formation. The suffix '-id', from Latin '-ides' (indicating belonging or connection), is a standard zoological ending used to form family and subfamily names. Thus, 'adelgid' literally means "a member of the family connected to the genus Adelges," a group of sap-sucking insects specialized on pine and spruce trees.
Analysis
The word is a modern scientific Latin formation, not composed of separable English morphemes. It is derived from the genus name Adelges, which itself is of obscure and uncertain etymology, possibly a fanciful or arbitrary creation.
Examples
The hemlock woolly adelgid is an invasive species threatening forests in eastern North America.
Forestry officials monitor fir trees for signs of adelgid infestation.
The life cycle of the adelgid involves alternating between two different host conifers.