protium
noun
pro·ti·um
ˈprō-tē-əm 
ˈprō-shē-
: the ordinary light hydrogen isotope of atomic mass 1
Examples of protium in a Sentence
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The fuel sources are far better than protium, but the extra neutrons are sprayed around and can cause problems.
—
Caroline Delbert, Popular Mechanics, 16 Feb. 2022
In research published in the journal Science, the Manchester researchers used the graphene as a sieve to sort protium, the lightest stable isotope of hydrogen, from deuterium, which, unlike protium, contains a neutron in its nucleus.
—IEEE Spectrum, 5 Jan. 2016
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Caroline Delbert, Popular Mechanics, 16 Feb. 2022
In research published in the journal Science, the Manchester researchers used the graphene as a sieve to sort protium, the lightest stable isotope of hydrogen, from deuterium, which, unlike protium, contains a neutron in its nucleus.
—IEEE Spectrum, 5 Jan. 2016
Cite this Entry
“Protium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/protium. Accessed 12 Mar. 2026.
Copy CitationMedical Definition
protium
noun
pro·ti·um
ˈprōt-ē-əm
ˈprō-shē-
ˈprō-shē-
: the ordinary light hydrogen isotope of atomic mass 1
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