black arm

black arm

noun Plant Pathology.
a type or phase of bacterial blight of cotton, characterized by black, elongated lesions on the stem and branches, caused by a bacterium, Xanthomonas malvacearum.

Origin:
1905–10

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Black arm is always a great word to know.
So is lollapalooza. Does it mean:
a fool or simpleton; ninny.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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