deuteriumn.

Brit.

/djuːˈtɪərɪəm/,

/dʒuːˈtɪərɪəm/, U.S.

/d(j)uˈtɛriəm/

Etymology: modern Latin, < Greek δεύτερος second + -ium suffix.

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.

ΘΚΠ

the world > matter > chemistry > elements and compounds > hydrogen > [noun] > isotopes

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).

单词	deuterium
释义	deuteriumn. Brit. /djuːˈtɪərɪəm/, /dʒuːˈtɪərɪəm/, U.S. /d(j)uˈtɛriəm/ Etymology: modern Latin, < Greek δεύτερος second + -ium suffix. 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. ΘΚΠ the world > matter > chemistry > elements and compounds > hydrogen > [noun] > isotopes 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). < n.1933
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