Definition of deuterium
: an isotope of hydrogen that has one proton and one neutron in its nucleus and that has twice the mass of ordinary hydrogen —symbol D —called also heavy hydrogen
Recent Examples of deuterium from the Web
The fusion reactors that Princeton Satellite Systems is developing uses low-frequency radio waves to heat a mix of deuterium and helium-3, and magnetic fields to confine the resulting plasma in a ring.
The fuels were deuterium and tritium, rare forms of hydrogen.
Deuterium, which is an isotope of hydrogen, has a neutron in its nucleus.
No, not robots fashioned of these materials or a new form of nuclear fusion that uses dried out husks and leaves to spark the deuterium-tritium cycle.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deuterium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of deuterium
New Latin, from Greek deuteros second
First Known Use: 1933See Words from the same year
Medical Definition of deuterium
: an isotope of hydrogen that has one proton and one neutron in its nucleus and that has twice the mass of ordinary hydrogen—called also heavy hydrogen
Seen and Heard
What made you want to look up deuterium? Please tell us where you read or heard it (including the quote, if possible).