fly·back

[flahy-bak]
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:
1930–35; noun use of verb phrase fly back

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World English Dictionary
flyback (ˈflaɪˌbæk) [Click for IPA pronunciation guide]
 
n
the fast return of the spot on a cathode-ray tube after completion of each trace

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Flyback is always a great word to know.
So is callithumpian. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Example sentences
Automotive ignition coils, and the flyback transformers used in ionizers might be in this category.
Flyback transformer produces characteristic highpitched noise when close to set.
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