þrívetni

Icelandic

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

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

þrívetni n (genitive singular þrívetnis, no plural)

declension of þrívetni

(isotopes of hydrogen)
protium: einvetni (also called prótín)

deuterium: tvívetni (also called þungt vetni or þungavetni)

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