1. Having the qualities of meal; resembling meal; soft, dry, and friable; easily reduced to a condition resembling meal; as, a mealy potato.
2. Overspread with something that resembles meal; as, the mealy wings of an insect.
(Science: zoology) Mealy bug, a scale insect (coccus adonidum, and related species), covered with a white powderlike substance. It is a common pest in hothouses.
Origin: Mealier; Mealiest.