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WordReference Random House Unabridged Dictionary of American English © 2024os•cil•lo•scope (ə sil′ə skōp′),USA pronunciation n. [Elect.]- a device that uses a cathode-ray tube or similar instrument to depict on a screen periodic changes in an electric quantity, as voltage or current.
- 1905–10; oscill(ate) + -o- + -scope
Collins Concise English Dictionary © HarperCollins Publishers:: oscilloscope /ɒˈsɪləˌskəʊp/ n - an instrument for producing a representation of a quantity that rapidly changes with time on the screen of a cathode-ray tube. The changes are converted into electric signals, which are applied to plates in the cathode-ray tube. Changes in the magnitude of the potential across the plates deflect the electron beam and thus produce a trace on the screen
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