[koo-lom-i-ter, kuh-]
noun Electricity.
Also, coulombmeter [koo-lom-mee-ter, -lohm-] .

1900–05; coulo(mb) + -meter Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
coulometer or coulombmeter (kuːˈlɒmɪtə, ˈkuːlɒmˌmiːtə)
Also called: voltameter an electrolytic cell for measuring the magnitude of an electric charge by determining the total amount of decomposition resulting from the passage of the charge through the cell
[C19: from coulomb + meter³]
coulombmeter or coulombmeter
[C19: from coulomb + meter³]
coulometric or coulombmeter
cou'lometry or coulombmeter

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
coulometer   (k-lŏm'ĭ-tər, k'lə-mē'tər)  Pronunciation Key 
A device for determining the amount of a substance released during electrolysis by measuring the electrical charge that results from the electrolysis. Coulometers can be used to detect and measure trace amounts of substances such as water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Hydroxide ions are generated by the coulometer circuitry so as to maintain the transmittance of the solution at a constant value.
Oxygen molecules permeating through the fixed film in the diffusion cell were detected by an oxygen-specific coulometer detector.
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