black arm

American  

noun

Plant Pathology.

1. 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.

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Etymology

Origin of black arm

First recorded in 1905–10

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Example Sentences

See Examples For:

black arm

In 1969, the Warren Court ruled for high school students who wore black arm bands as a protest.

From Los Angeles Times ● May 27, 2025

The Süddeutsche Zeitung, in its coverage of the Cologne attacks, prominently featured an illustration of a woman’s legs silhouetted in white, with the space in between taken up by a black arm and hand.

From The Guardian ● Aug. 1, 2019

We tied black arm bands on our left biceps in memory of cyclists who had died in collisions with motorists.

From Salon ● Jun. 6, 2013

At Sunday's game, fans from both sides observed the silence, the two teams wore black arm bands and Rangers wore commemorative shirts with a special badge reading "2nd January, 1971, Always Remembered".

From BBC ● Jan. 3, 2011

I clamped onto his thick black arm and tried to push it away but I couldn’t budge him.

From "We Were Here" by Matt De La Peña

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