protium

American  

[proh-tee-uhm, -shee-uhm] / ˈproʊ ti əm, -ʃi əm /

noun

Chemistry.

1. the lightest and most common isotope of hydrogen. 1 H

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protium British  

/ ˈprəʊtɪəm /

noun

1. the most common isotope of hydrogen, having a mass number of 1

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protium Scientific  

/ prō′tē-əm,-shē-əm /

1. The most abundant isotope of hydrogen, having an atomic mass of 1. Its nucleus consists of a single proton.

2. See more at hydrogen

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Etymology

Origin of protium

First recorded in 1930–35; prot- + -ium

Example Sentences

I had previously reported to the Chemical Staff that I had found means to increase materially the extraction percentage of the precious element protium from the crude imported ore.

From City of Endless Night by Hastings, Milo M. (Milo Milton)

When I told Dr. Zimmern that I should solve the problem of the increase of the supply of protium I may have been guilty of speaking of hopes as if they were certainties.

From City of Endless Night by Hastings, Milo M. (Milo Milton)

My optimism was based on the discovery that the exact chemical state of the protium in the ore was unknown, and that it did not exist equally in all samples of the ore.

From City of Endless Night by Hastings, Milo M. (Milo Milton)

"Then," I said, speaking with studied emphasis, "I cannot proceed with the work of extracting protium."

From City of Endless Night by Hastings, Milo M. (Milo Milton)

The original use of protium had, I found, been discovered late in the Twentieth Century when the protium ores of the Ural Mountains were still available to the German chemists.

From City of Endless Night by Hastings, Milo M. (Milo Milton)