- any of several scalelike, homopterous insects of the families Pseudococcidae and Eriococcidae that are covered with a powdery wax secretion and feed on plants.
- any plant-eating homopterous insect of the genus Pseudococcus and related genera, coated with a powdery waxy secretion: some species are pests of citrus fruits and greenhouse plants: family Pseudococcidae
