tobacco mosaic

tobacco mosaic

noun Plant Pathology.
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.

Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Tobacco mosaic is always a great word to know.
So is quincunx. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
WordNet
tobacco mosaic

noun
a plant disease causing discoloration of the leaves of tobacco plants 
WordNet® 3.0, © 2006 by Princeton University.
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