aphid (afid)

[ ( aphid- ).] An aphidian; a plant-louse; a member of the genus Aphis or family Aphidida (which see). In the plural, the plant-lice: a general or indeterminate term for the members (a) (a) of the genus Aphis , (b) of the family Aphididæ , or (c) of the suborder Phytophthiria .