platinum black

noun

A soft, dull black powder consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer.

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Meanings

nounplatinum black (uncountable)
  1. uncountableA soft, dull black powder consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer.
    1 more example

    "In the meanwhile," remarked Carrados, "if you find the time hang heavy on your hands you might look up the subject of 'platinum black.' […] It is a chemical that has the remarkable property of igniting hydrogen or coal gas by mere contact," replied Carrados. "Think how useful that may be if you haven't got a match!"

    1923, Ernest Bramah [pseudonym; Ernest Brammah Smith], “(please specify the page)”, in The Eyes of Max Carrados, London: Grant Richards, →OCLC
Cite this entry
APA

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

MLA

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

Chicago

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

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