meal·y·bug, mealy bug n. Zool., Any of several homopteran scale insects (as, Coccus adonidum, and related species of the families Pseudococcidae and Eriococcidae), that cover themselves with a white powderlike or cottony wax secretion. They are common plant-eating pests in hothouses and are also destructive of fruit trees.
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mealy bug
n : scale-like plant-eating insect coated with a powdery waxy
secretion; destructive especially of fruit trees [syn: mealybug]