/ˈmɛːtʰaːn/
UppruniBorrowed from French méthane and German Methan.
Beygingarmetans(genitive, singular) · metan(indefinite, nominative, singular) · metanið(definite, nominative, singular) · metan(accusative, indefinite, singular) · metanið(accusative, definite, singular) · metani(dative, indefinite, singular) · metaninu(dative, definite, singular) · metans(genitive, indefinite, singular) · metansins(definite, genitive, singular)
Heimild: Wiktionary