os·cil·lo·scope

[uh-sil-uh-skohp]
noun Electricity.
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.

Origin:
1905–10; oscill(ate) + -o- + -scope

os·cil·lo·scop·ic [uh-sil-uh-skop-ik] , adjective
os·cil·lo·scop·i·cal·ly, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
oscilloscope (ɒˈsɪləˌskəʊp) [Click for IPA pronunciation guide]
 
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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00:10
Oscilloscope is always a great word to know.
So is ort. Does it mean:
a gadget; dingus; thingumbob.
a scrap or morsel of food left at a meal.
Etymonline
Word Origin & History

oscilloscope
1915, "instrument for visually recording an electrical wave," a hybrid formed from L. oscillare "to swing" (see oscillation) + Gk. -skopion, from skopein "to look at, examine."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

oscilloscope os·cil·lo·scope (ə-sĭl'ə-skōp')
n.
An electronic instrument that produces an instantaneous trace on the screen that corresponds to oscillations of voltage and current.


os·cil'lo·scop'ic (-skŏp'ĭk) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
oscilloscope   (ə-sĭl'ə-skōp')  Pronunciation Key 
An electronic instrument used to observe and measure changing electrical signals. The amplitude of the signal as it varies with time is displayed graphically on a screen as a line stretching from left to right, with displacements up and down indicating the amplitude of the signal. Oscilloscopes are used to diagnose problems in electronic signal-processing devises, such as computers or stereos, and to monitor electrical activity in the body, such as that of heartbeats.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
One of the two privates on duty looks at the radar oscilloscope and can't
  believe his eyes.
We normally measure the power of each beam with a photodiode that is read out
  by a high-speed oscilloscope.
The results were displayed as a wave on the oscilloscope.
Oscilloscope traces of the output waveforms with all critical faults that would
  affect the output characteristics.
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