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deuterium: Meaning and Definition of

deu•te•ri•um

Pronunciation: (d-tēr'ē-um, dy-), [key]
— n. Chem.
  1. an isotope of hydrogen, having twice the mass of ordinary hydrogen; heavy hydrogen. Symbol: D; at. wt.: 2.01; at. no.: 1.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
deuteride deuterium oxide
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