DEUTERIUM /djuːˈtɪəɹɪəm/ Scrabble 12 Words With Friends 15 Definition noun an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen). — synonyms: heavy_hydrogen Examples “There were about 80 deuteriums for every million protiums, and virtually no tritium.” See all 154 words you can make from DEUTERIUM → 9-letter words Words starting with D Words ending with M ← Unscramble different letters