scanning line

(in a cathode-ray or television tube) a single horizontal trace made by the electron beam in one traversal of the fluorescent screen. Compare frame ( def 9 ).

1925–30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The laser draws an image onto the screen by scanning line by line from top to bottom.
In facsimile transmission, the portion of the scanning line that can be specifically used for image signals.
The process that established a fixed level for the picture level at the beginning of each scanning line.
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