extensometer

[ek-sten-som-i-ter]

noun

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

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. 2019

British Dictionary definitions for extensometer

extensometer

extensimeter (ˌɛkstɛnˈsɪmɪtə)

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