Breadcrumb Home > Dictionary > Index T tobacco mosaic: Meaning and Definition of Find definitions for: tobac'co mosa"ic Pronunciation: [key] — Plant Pathol. Plant Pathol. a disease of the nightshade family of plants, particularly tobacco and tomato, caused by the tobacco mosaic virus and characterized by mottled leaves and yellowed, necrotic plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tobacco hornworm tobacco mosaic virus TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: praedial Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language