tritium
English Thesaurus
1. a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms (noun.substance)
hypernym | : | atomic number 1, h, hydrogen, |
definition | : | a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe (noun.substance) |
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