/ Dictionary / Index T tobacco mosaic virus: Meaning and Definition of Find definitions for: tobac'co mosa"ic vi"rus Pronunciation: [key] a retrovirus causing mosaic disease in members of the nightshade family. Abbr.: TMV Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tobacco mosaic tobacconist Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language