extensometer

[ ek-sten-som-i-ter ]
/ ˌɛk stɛnˈsɒm ɪ tər /

noun

an instrument for measuring minute degrees of expansion, contraction, or deformation.

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Origin of extensometer

First recorded in 1885–90; extens(ion) + -o- + -meter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for extensometer

extensometer

extensimeter (ˌɛkstɛnˈsɪmɪtə)

/ (ˌɛkstɛnˈsɒmɪtə) /

noun

an apparatus for studying small changes of length, as in the thermal expansion or mechanical compression of a solid
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