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black oxide

noun

Definitions

  1. Any of several coatings for steels or copper

    Any of several coatings for steels or copper; some are oxides (mainly iron(II,III) oxide), some are nitrites or nitrates, and some are selenides; all are black; the main purposes are the antireflective and cosmetic effects; the anticorrosion effects are small.

    • Near-synonym: blackening
    • hot black oxide
    • cold black oxide

  2. Used other than figuratively or idiomatically

    Used other than figuratively or idiomatically: any oxide that is black; often, iron(II,III) oxide.

The neighborhood

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sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA