SYN: hydrogen-2. [G. deuteros, second]
- d. oxide SYN: heavy water.
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deu·te·ri·um d(y)ü-'tir-ē-əm n 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
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deu·te·ri·um (D) (2H) (doo-tērґe-əm) [Gr. deuteros second] the mass two isotope of hydrogen (q.v.). It is available as a gas or as heavy water and has been used in metabolic studies; called also heavy hydrogen. Cf. protium and tritium.Medical dictionary. 2011.