black ring

black ring

[′blak ‚riŋ]
(plant pathology)
A virus disease of cabbage and other members of the family Cruciferae characterized by dark necrotic and often sunken rings on the surface of the leaf.
A virus disease of the tomato characterized in the early stage by small black rings on young leaves.
References in classic literature ?
I observed, however, that he was a "Keshla" or ringed man; that is, he wore on his head the black ring, made of a species of gum polished with fat and worked up in the hair, which is usually assumed by Zulus on attaining a certain age or dignity.
Once again Gilbert had lodged three arrows in the white; Tepus came second with two in the white and one in the black ring next to it; but stout Clifton had gone down and Hubert of Suffolk had taken the third place, for, while both those two good yeomen had lodged two in the white, Clifton had lost one shot upon the fourth ring, and Hubert came in with one in the third.
She was perceptibly thinner, and there were black rings under her eyes.
By daylight, Jurgis was able to observe that the color on her cheeks was not the old natural one of abounding health; her complexion was in reality a parchment yellow, and there were black rings under her eyes.
SKRIPAL would kiss a black ring with the figure of a wolf on it before telling taxi drivers: "I'm a Russian spy," a cab-firm boss revealed yesterday.
This year, the company went one better and demonstrated an integrated Li-Fi luminaire, which integrates the modulation components into a black ring designed to encircle an LED light.
This is my right hand," Phelps said, despite raising what appeared to be his left hand with a black ring on his ring finger.
The product comes in three exciting variants: a ring ornamented with 18K rose gold with sapphire crystal, a rose gold ring and a black ring.
I personally preferred the seamless flow of symmetry on the Juxt's design, and the abrupt use of plastic on the black ring somewhat disrupts the all-metal feel that Titan wants to bring.
Black ring people - 13 per cent of the population - hold 2.