英和和英

語源

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

発音

• (英国発音) IPA: /djuːˈtɪəɹɪəm/, /dʒuːˈtɪəɹɪəm/
• (米国発音) IPA: /djuːˈtɪɹi.əm/
• ハイフネーション: deu‧te‧ri‧um
• 韻: -ɪəɹiəm

名詞

deuterium (countable and uncountable, plural deuteriums)

1. (uncountable, physics) An isotope of hydrogen with one proton and one neutron in each atom - ₁H.

   Alternative form: D (deprecated symbol)

   Synonyms: H-2, ²H, hydrogen-2, hydrogen 2, heavy hydrogen

   Hypernyms: hydrogen, H

   Coordinate terms: protium, H-1, ¹H, hydrogen-1, hydrogen 1, normal hydrogen, light hydrogen (1 nucleon); H-3, ³H, T, tritium, hydrogen-3, hydrogen 3 (3 nucleons); H-4, ⁴H, Q, quadrium, hydrogen-4, hydrogen 4 (4 nucleons); hyperhydrogen

   Heavy water is "heavy" because it contains deuterium.

2. (countable) An atom of this isotope.

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

使用する際の注意点

IUPAC recommends that the chemical symbol for deuterium should be H, rather than D; to prevent problems in alphabetical sorting of formulae. Likewise, tritium should be called H, rather than T.

派生語

関連する語

豆知識

Natural hydrogen on Earth is about 150 parts per million deuterium, by number of atoms.

参考

• heavy water

参照

• Elementymology

語形変化

Second-declension noun (neuter).

Found in older Latin (until the Augustan Age).