| 释义 |
deu·te·ri·um
\d(y)üˈtirēəm\ noun
(-s)
Etymology: deuter- (I) + -ium
: the isotope of hydrogen that has atoms of twice the mass of ordinary light hydrogen atoms, that occurs naturally in very small amounts in water, and that is used in nuclear reactions and as a tracer in chemical and biological investigations — called also heavy hydrogen; symbol D, H2, or 2H |