heavy hydrogen
Noun
Meaning
an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)
Source: WordNetSynonyms
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Related terms
Examples
Deuterium ("heavy hydrogen") already has the extra neutron that light hydrogen would absorb, reducing the tendency to capture neutrons.
The nuclei of the heavy hydrogen isotopes deuterium and tritium contain one proton bound to one and two neutrons, respectively.