protium

RELATED WORDS :

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Noun
 : 
pro=ti=um

WORDNET DICTIONARY

Noun protium has 1 sense

OXFORD DICTIONARY

protium, n. the ordinary isotope of hydrogen as distinct from heavy hydrogen (cf. DEUTERIUM, TRITIUM).

Etymology
mod.L f. PROTO- + -IUM

For further exploring for "protium" in Webster Dictionary Online


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