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a combining form meaning “measure,” used in the names of instruments measuring quantity, extent, degree, etc.:
altimeter; barometer.
Compare -metry.
Origin of -meter
< New Latin -metrum < Greek métron measure Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for -meter


combining form
indicating an instrument for measuring: barometer
(prosody) indicating a verse having a specified number of feet: pentameter
Word Origin
from Greek metron measure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for -meter

word-forming element meaning "device or instrument for measuring; commonly -ometer, occasionally -imeter; from French -mètre, from Greek metron (see meter (n.3)).

Online Etymology Dictionary, © 2010 Douglas Harper
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-meter in Medicine

-meter suff.
Measuring device: refractometer.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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