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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 of black arm
First recorded in 1905-10 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for black arm
Historical Examples
  • His black arm, with the hand all gnarled with work lay on the table.

    Sons and Lovers David Herbert Lawrence
  • His black arm, with the hand all gnarled with work, lay on the table.

    Sons and Lovers David Herbert Lawrence
  • But the Oracle hears them not; he is looking in the mass of colour for a purple cap and grey jacket, with black arm bands.

    Three Elephant Power Andrew Barton 'Banjo' Paterson
  • A frightful figure tore itself free from the group, encircled this innocent bystander with a black arm, and hurled him headlong.

    Penrod Booth Tarkington
  • She set her strong white teeth in his black arm; but with a brutal gesture he flung her light weight from him.

  • They pushed the boat into the middle of the black arm of water and stepped cautiously into it.

    The Kingdom of the Blind E. Phillips Oppenheim
  • This is a sign of mourning, similar to the black arm bands that were in fashion in the United States a decade ago.

  • A black arm was suddenly silhouetted across the shoulders of a white blouse, whose wearer received a reassuring hug.

    Cynthia's Chauffeur

    Louis Tracy
  • The next instant I saw a black arm and shoulder come forward, the spear was picked up, and the black arm disappeared.

    Bunyip Land George Manville Fenn
  • As he spoke, the thin, black arm of his vis-a-vis trembled for a moment in the ample folds of his black gown.

    Under the Witches' Moon Nathan Gallizier

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