/ Dictionary / Index M myiasis: Meaning and Definition of Find definitions for: my•ia•sis Pronunciation: (mī'u-sis), [key] — pl. -ses any disease that results from the infestation of tissues or cavities of the body by larvae of flies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: myiasis (Thesaurus) myelopathy Myingyan Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language