EXTENSOMETER

Noun

extensometer (plural extensometers)

An electromechanical device for measuring changes in length of an object undergoing stress.

Source: Wiktionary

Ex`ten*som"e*ter, n. Etym: [Extension + -meter.]

Definition: An instrument for measuring the extension of a body, especially for measuring the elongation of bars of iron, steel, or other material, when subjected to a tensile force.

Source: Webster’s Unabridged Dictionary 1913 Edition

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