noun
: a spot of light that is moved over an image so that light reflected from or transmitted by different parts of the image is translated into electrical signals for transmission (as in television)
noun
: a spot of light that is moved over an image so that light reflected from or transmitted by different parts of the image is translated into electrical signals for transmission (as in television)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012