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black hydrogen

American  
[blak hahy-druh-juhn] / ˈblæk ˈhaɪ drə dʒən /

noun

  1. hydrogen that is produced by breaking down coal, especially bituminous coal, with steam and oxygen, releasing high amounts of carbon into the atmosphere.

Etymology

Origin of black hydrogen

First recorded in 2000–05

Example Sentences

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The production of black hydrogen comes from partially burning coal.

From BBC ● Aug. 8, 2024

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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