/ Dictionary / Index M mealybug: Meaning and Definition of Find definitions for: meal•y•bug Pronunciation: (mē'lē-bug"), [key] — n. any of several scalelike, homopterous insects of the families Pseudococcidae and Eriococcidae that are covered with a powdery wax secretion and feed on plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mealybug (Thesaurus) mealy mealy-mouthed Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language