What is an instrument for measuring the degree of hardness; especially, an instrument for testing the relative hardness of steel rails and the like called?
durometer — An instrument for measuring the degree of hardness; especially, an instrument for testing the relative hardness of steel rails and the like. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00