/ Dictionary / Index M myxovirus: Meaning and Definition of Find definitions for: myx•o•vi•rus Pronunciation: (mik'su-vī"rus, mik"su-vī'-), [key] — pl. -rus•es. any of a group of medium-sized, RNA-containing viruses having a helical envelope, infectious to humans and other animals and a cause of influenza. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: myxovirus (Thesaurus) myxospore N, n Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language