- a stable isotope of hydrogen, occurring in natural hydrogen (156 parts per million) and in heavy water: used as a tracer in chemistry and biology. Symbol: D or ²H; atomic no: 1; atomic wt: 2.014; boiling pt: –249.7°C
单词 | deuterium |
释义 | WordReference Random House Unabridged Dictionary of American English © 2024 deu•te•ri•um (do̅o̅ tēr′ē əm, dyo̅o̅-),USA pronunciation n. [Chem.]
Collins Concise English Dictionary © HarperCollins Publishers:: deuterium /djuːˈtɪərɪəm/ n
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