scanning disk

noun Television.

(in mechanical scanning) a disk with a line of holes spiraling in from its edge, rotated in front of a surface so as to expose a small segment as each hole passes before it for transmitting or reproducing a picture.

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Origin of scanning disk

First recorded in 1925–30

Words nearby scanning disk

Scandinavian, Scandinavian Shield, scandium, scandium oxide, scanner, scanning disk, scanning electron microscope, scanning force microscope, scanning line, scanning probe microscope, scanning tunneling microscope
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020