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.
THE OCTOBER WORD OF THE DAY QUIZ IS HERE TO HAUNT YOU
Search your capacious memory for the meaning of October’s words!
Question 1 of 9
Which Word of the Day from this month means, “an irrational dislike; loathing”?
Origin of black arm
First recorded in 1905–10
Words nearby black arm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020