ofurþungt vetni

== Icelandic == === Etymology === Literally, “super-heavy hydrogen”. === Noun === ofurþungt vetni n (genitive singular ofurþungs vetnis, no plural) (physics, symbol T or 31H) tritium Synonym: þrívetni ==== Declension ==== ==== Hypernyms ==== vetni (“hydrogen”) ==== Coordinate terms ==== (isotopes of hydrogen) protium: einvetni (also called prótín) deuterium: tvívetni (also called þungt vetni or þungavetni)