deuteriumn.
/djuːˈtɪərɪəm/, /dʒuːˈtɪərɪəm/, U.S. /d(j)uˈtɛriəm/ Chemistry.
One of the isotopes of hydrogen, differing from the commonest isotope in having a neutron as well as a proton in the nucleus and present to about 1 part in 6000 in naturally occurring hydrogen (elemental and combined); also called heavy hydrogen. Symbols 2H (also H2), D.
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D1933
deuterium1933
diplogen1933
protium1933
tritium1933
T1948
1933 H. C. Urey et al. in Jrnl. Chem. Physics I. 513/1 We wish to propose that the names for the H1 and H2 isotopes be protium and deuterium.
1934 Times Educ. Suppl. 18 Aug. p. i/2 The newly discovered ‘heavy water’ or deuterium oxide in Antarctic snow.
1935 Discovery June 179/2 ‘Heavy water’..is rich in deuterium, the hydrogen isotope of mass 2.
1958 Engineering 31 Jan. 134/3 The deuterium or heavy-hydrogen content of seawater is calculated to be sufficient to sustain present energy consumption for a thousand million years.
This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022).
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