po·ten·ti·om·e·ter

[puh-ten-shee-om-i-ter]
noun Electricity.
1.
a device for measuring electromotive force or potential difference by comparison with a known voltage.

Origin:
1880–85; potenti(al) + -o- + -meter

po·ten·ti·o·met·ric [puh-ten-shee-uh-me-trik] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
potentiometer (pəˌtɛnʃɪˈɒmɪtə) [Click for IPA pronunciation guide]
 
n
1.  an instrument for determining a potential difference or electromotive force by measuring the fraction of it that balances a standard electromotive force
2.  a device with three terminals, two of which are connected to a resistance wire and the third to a brush moving along the wire, so that a variable potential can be tapped off: used in electronic circuits, esp as a volume control
 
potenti'ometry
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Potentiometer has a plethora of syllables.
So is cyclotrimethylenetrinitramine. Does it mean:
a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells.
given to using long words.
American Heritage
Science Dictionary
potentiometer   (pə-těn'shē-ŏm'ĭ-tər)  Pronunciation Key 
  1. A mechanical variable resistor. See more at resistor.

  2. An instrument for measuring an unknown voltage by comparison with a known voltage, such as that of a generator.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Jumps or other inconsistencies indicate that the azimuth potentiometer has bad or worn spots.
Connect the potentiometer to an appropriate thermocouple and insert the thermocouple in a beaker of boiling water.
Wires are of two uniaxial load cells and a string potentiometer.
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