Deuterium meaning

do͝o-tîrē-əm, dyo͝o-
A naturally occurring isotope of hydrogen, H-2, having one proton and one neutron in the nucleus.
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A hydrogen isotope used in nuclear reactors, accelerators, etc.: symbol, D; at. wt. 2.0141
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An isotope of hydrogen whose nucleus has one proton and one neutron and whose atomic mass is 2. Deuterium is used widely as a tracer for analyzing chemical reactions, and it combines with oxygen to form heavy water.
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(physics) An isotope of hydrogen formed of one proton and one neutron in each atom - 21H.

Heavy water is “heavy” because it contains deuterium.

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An atom of this isotope.

There were about 80 deuteriums for every million protiums, and virtually no tritium.

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Origin of deuterium

  • deuter(o)– –ium

    From American Heritage Dictionary of the English Language, 5th Edition

  • Coined by Harold Urey, an American chemist, from Ancient Greek δεύτερος (deuteros, “second”) + -ium.

    From Wiktionary