einvetni

== Icelandic == === Etymology === From ein- (“mono-, uni-, mono”) +‎ vetni (“hydrogen”). === Pronunciation === IPA(key): /ˈein.vɛhtnɪ/ === Noun === einvetni n (genitive singular einvetnis, no plural) (physics, symbol 11H) protium Synonym: prótín ==== Declension ==== ==== Hypernyms ==== vetni (“hydrogen”) ==== Coordinate terms ==== (isotopes of hydrogen) deuterium: tvívetni (also called þungt vetni or þungavetni) tritium: þrívetni (also called ofurþungt vetni) ==== Derived terms ==== einvetnisfrumeind