comparator

comparator

[kuhm-par-uh-ter, kom-puh-rey-]
noun
1.
any of various instruments for making comparisons, as of lengths or distances, tints of colors, etc.
2.
Electronics. a circuit for comparing two signals, as readings of duplicate information stored in a digital computer, and for giving an indication of agreement or disagreement between them.

Origin:
1880–85; < Late Latin comparātor a comparer. See compare, -tor

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World English Dictionary
comparator (kəmˈpærətə)
 
n
1.  any instrument used to measure a property of a system by comparing it with a standard system
2.  an electric circuit that compares two signals and gives an indication of the extent of their dissimilarity

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

comparator
1883, agent noun in Latin form from compare.
Online Etymology Dictionary, © 2010 Douglas Harper
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