flyback

[ flahy-bak ]
/ ˈflaɪˌbæk /

noun Electronics.

the return to its starting point of the electron beam in a cathode ray tube, as after the completion of a line in a television picture or of a trace in an oscilloscope.

Origin of flyback

First recorded in 1930–35; noun use of verb phrase fly back

British Dictionary definitions for flyback

flyback
/ (ˈflaɪˌbæk) /

noun

the fast return of the spot on a cathode-ray tube after completion of each trace