English Wikipedia has an article on: <span class="searchmatch">dirubidium</span> Wikipedia From di- + rubidium. <span class="searchmatch">dirubidium</span> (uncountable) (inorganic chemistry, in combination) Two atoms...
highly reactive alkali metal. (countable) A single atom of this element. <span class="searchmatch">dirubidium</span> iodrubidium monorubidium organorubidium radiorubidium rubidide rubidium...