deuterium

Coined by Harold Urey, an American chemist, from Ancient Greek δεύτερος (deúteros, “second”), +‎ -ium.

• (UK) IPA^(key): /djuːˈtɪəɹɪəm/, /dʒuːˈtɪəɹɪəm/
• (US) IPA^(key): /djuːˈtɪɹi.əm/
• Hyphenation: deu‧te‧ri‧um

deuterium (plural deuteriums)

1. (physics) An isotope of hydrogen formed of one proton and one neutron in each atom - ²₁H.

   Heavy water is “heavy” because it contains deuterium.

2. An atom of this isotope.

   There were about 80 deuteriums for every million protiums, and virtually no tritium.

• heavy hydrogen
• D (chemical symbol)

• hydrogen

• (isotopes of hydrogen): protium, tritium, quadrium

• deuterium oxide

• deuteron

• heavy water

• Elementymology

deuterium n

1. deuterium (isotope of hydrogen)

Coined by Harold Urey, an American chemist, from Ancient Greek δεύτερος (deúteros, “second”) + -ium.

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• Hyphenation: deu‧te‧ri‧um

deuterium n (uncountable)

1. deuterium

deuterium

1. (physics) deuterium

deuterium n (genitive deuteriī or deuterī); second declension

1. deuterium

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

From English hydrogen, from Ancient Greek δεύτερος (deúteros, “second”) + -ium.

• IPA^(key): [deutəriom], [deutəriəm], [diutəriəm]
• Rhymes: -iom, -jom, -om

deuterium

1. (physics) deuterium (isotope of hydrogen)