A naturally occurring isotope of hydrogen, H-2, having one proton and one neutron in the nucleus.
A hydrogen isotope used in nuclear reactors, accelerators, etc.: symbol, D; at. wt. 2.0141
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.
An atom of this isotope.
There were about 80 deuteriums for every million protiums, and virtually no tritium.
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.