What is a thin film on the surface of a metal, usually due to a slight alteration of the original color; as, the steel tarnish in columbite called?
tarnish — (Min.) A thin film on the surface of a metal, usually due to a slight alteration of the original color; as, the steel tarnish in columbite. (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