black arm

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.

Word History and Origins

Origin of black arm¹

First recorded in 1905–10

Example Sentences

Manchester United are wearing black arm bands to commemorate the Munich Air Disaster.

From The Guardian

He was known in his time as the “the fighting editor” — a posture that The Planet reflected with a logo depicting a muscular Black arm whose clenched fist radiated lightning bolts.

From New York Times

Coach Giovanni Saverese wore a black arm band.

From Washington Times

Coach Giovanni Saverese wore a black arm band.

From Seattle Times

In that case — centered on students who donned black arm bands to protest the Vietnam War, spurring administrators to suspend the students and prohibit the bands — the court judged that schools cannot forbid speech unless it is likely to generate “significant, immediate disruption,” Ross said.

From Washington Post