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Word of the Day Wednesday, June 10, 2026

protium

/ˈproʊtiəm/ noun · British & US
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What does protium mean?

noun

The lightest and most abundant isotope of hydrogen, consisting of one proton and one electron. It is the most common form of hydrogen in the universe.

Example

"The scientist studied the properties of protium in the lab."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for protium

Antonyms of protium

Rhymes with protium

Etymologically related