Etymology
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deuterium (n.)

1933, coined by U.S. chemist Harold C. Urey, with Modern Latin ending + Greek deuterion, neuter of deuterios "having second place," from deuteros "next, second," a word of uncertain origin. According to some sources from duo "two" (from PIE root *dwo- "two"), but according to Watkins the ground sense is "missing" and the Greek word is from PIE from *deu-tero-, suffixed form of *deu- (1) "to lack, be wanting." But Beekes doubts even this. So called because it is twice the mass of hydrogen.

Entries linking to deuterium

*dwo- 

Proto-Indo-European root meaning "two."

It forms all or part of: anadiplosis; balance; barouche; between; betwixt; bezel; bi-; binary; bis-; biscuit; combination; combine; deuce; deuterium; Deuteronomy; di- (1) "two, double, twice;" dia-; dichotomy; digraph; dimity; diode; diphthong; diploid; diploma; diplomacy; diplomat; diplomatic; diplodocus; double; doublet; doubloon; doubt; dozen; dual; dubious; duet; duo; duodecimal; duplex; duplicate; duplicity; dyad; epididymis; hendiadys; pinochle; praseodymium; redoubtable; twain; twelfth; twelve; twenty; twi-; twice; twig; twilight; twill; twin; twine; twist; 'twixt; two; twofold; zwieback.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit dvau, Avestan dva, Greek duo, Latin duo, Old Welsh dou, Lithuanian dvi, Old Church Slavonic duva, Old English twa, twegen, German zwei, Gothic twai "two;" first element in Hittite ta-ugash "two years old."

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Definitions of deuterium

deuterium (n.)
an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen);
Synonyms: heavy hydrogen
From wordnet.princeton.edu

Dictionary entries near deuterium

detrude

*deu-

deuce

*deuk-

deus

deuterium

deutero-

deuterogamy

Deuteronomy

Deutsch

deva

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