black oxide

noun

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.

“hot black oxide”

Similar
blackening
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Meanings

nounblack oxide (countable and uncountable, plural black oxides)

plural black oxides

  1. countableidiomaticuncountableAny 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.

    hot black oxide

    2 more examples

    Near-synonym: blackening

    cold black oxide

    Synonyms: blackening

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

Synonyms & antonyms

nounAny 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.

Similar
blackening
Cite this entry
APA

black oxide. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/black%20oxide

MLA

“black oxide.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/black%20oxide. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “black oxide,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/black%20oxide.

Source: black oxide on Wiktionary, CC BY-SA 4.0.