From methane + -ium. <span class="searchmatch">methanium</span> (uncountable) (chemistry) the carbocation, CH5+, derived by the hydrogenation of methane methonium...
alkanium ion (plural alkanium ions) (organic chemistry) Any carbocation obtained by hydrogenation of an alkane. carbonium ion <span class="searchmatch">methanium</span> ethanium...
(plural alkaniums) (organic chemistry) any carbocation obtained by hydrogenation of an alkane alkanium ion carbonium ion <span class="searchmatch">methanium</span> ethanium Kalmunai...
methanesulfonamide methanesulfonic acid methanethiol methanic methanide methaniferous <span class="searchmatch">methanium</span> methanize methanogen methanogenesis methanogenetic methanoic methanol...
masrium masurium megamillennium meitnerium meitnium mendelevium mesonium <span class="searchmatch">methanium</span> methylthioninium millionennium mithridatium morpholinium moscovium muonium...