say it: doo-TEE-ree-uhm
deuterium is a noun meaning "an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)". It carries one recorded sense.
an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for deuterium come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.