galvanometer

[gal-vuh-nom-i-ter]
noun
an instrument for detecting the existence of small electric currents and determining their strength.

Origin:
1795–1805; galvano- + -meter

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
galvanometer (ˌɡælvəˈnɒmɪtə)
 
n
any sensitive instrument for detecting or measuring small electric currents
 
galvanometric
 
adj
 
galvano'metrical
 
adj
 
galvano'metrically
 
adv
 
galva'nometry
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

galvanometer
1802, from comb. form of galvanism + meter.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
galvanometer   (gāl'və-nŏm'ĭ-tər)  Pronunciation Key 
An instrument that detects small electric currents and indicates their direction and relative strength. current flowing through the galvanometer passes through a coil near a magnetized needle on a pivot; the strength of the current in the coil regulates the strength of a magnetic field that displaces the needle. Galvanometers can be used directly as ammeters, and are the core element of many ohmmeters and voltmeters.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The blasting galvanometer has an indicator needle which measures resistance of the circuit to which it is attached.
No blasting shall be allowed unless a galvanometer is used to check cap circuits.
For an electric initiation system, the check is performed both visually and by using a blasting galvanometer or other device.
No blasting shall be allowed unless a galvanometer is employed to check cap circuits.
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