oscilloscope

n. instrument which displays electric currents on a florescent screen with a cathode ray tube (used to test the electric impulses produced by the heart and the brain)

An oscilloscope (sometimes abbreviated CRO, for cathode-ray oscilloscope, or commonly just scope or O-scope) is a type of electronic test equipment that allows signal voltages to be viewed, usually as a two-dimensional graph of one or more electrical potential differences (vertical axis) plotted as a function of time or of some other voltage (horizontal axis).
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Oscilloscope /os·cil·lo·scope/ an instrument that displays a visual representation of electrical variations on the fluorescent screen of a [more]Oscilloscope - Community and Resources

Noun
1. electronic equipment that provides visual images of varying electrical quantities
(synonym) scope, cathode-ray oscilloscope, CRO
(hypernym) electronic equipment
(part-holonym) radar, microwave radar, radio detection and ranging, radiolocation
(part-meronym) cathode-ray tube, CRT

n. oscilloscope, instrument which displays electric currents on a florescent screen with a cathode ray tube (used to test the electric impulses produced by the heart and the brain)