dark spot

dark spot

[′därk ‚spät]
(electronics)
A spot on a television receiver tube that results from a spurious signal generated in the television camera tube during rescan, generally from the redistribution of secondary electrons over the mosaic in the tube.
References in classic literature ?
No more than he knew what horror that dark spot represented, did he know that Ah Moy's slant eyes had long since noticed it and were continuing to notice it, day by day, with secret growing terror.
Soon the two ships diverged their wakes; and long as the strange vessel was in view, she was seen to yaw hither and thither at every dark spot, however small, on the sea.
Now when they observed the earth through the lower window, it looked like nothing more than a dark spot, drowned in the solar rays.
A dark spot of a few acres in extent at the southern extremity of this beautiful flat, and immediately under the feet of our travellers, alone showed by its rippling surface, and the vapors which exhaled from it, that what at first might seem a plain was one of the mountain lakes, locked in the frosts of winter.
From the distance and the elevation of the highlands where I stood the Pellucidarian noonday moon showed half in sunshine and half in shadow, while directly be-neath it was plainly visible the round dark spot upon the surface of Pellucidar where the sun has never shone.
The dark spot by the road that you might not notice at all is, you see, the beginning of everything.
His early death had been the only dark spot in his life, unless the papers in Miss Bordereau's hands should perversely bring out others.
Bast also figured, appearing now as a bright spot in civilization, now as a dark spot, according to the temperament of the speaker.
Dirkovitch's dull green uniform was the only dark spot at the board, but his big onyx eyes made up for it.
Its shrill and piercing cries drew all eyes upon it, and, as it came nearer, a dark spot which circled above it resolved itself into a peregrine falcon, which hovered over its head, poising itself from time to time, and watching its chance of closing with its clumsy quarry.
He had a bulging forehead, covered with wrinkles, and a cavernous face, in which two small gray eyes with a dark spot in either of them seemed to be pierced rather than set.
Depend upon it, it comes of thinking and dwelling on that dark spot.