Pronunciation: (ras'tur), [key]
1. Television.a pattern of scanning lines covering the area upon which the image is projected in the cathode-ray tube of a television set.
2. Computers.a set of horizontal lines composed of individual pixels, used to form an image on a CRT or other screen.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.