Icelandic edit

Etymology edit

From þrí- (tri-, three) +‎ vetni (hydrogen).

Noun edit

 
A picture of einvetni (protium), tvívetni (deuterium) and þrívetni (triterium).

þrívetni n (genitive singular þrívetnis, no plural)

  1. (physics, symbol T or 31H) tritium

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