(So named (Modern Latin Holmia, Stockholm) by P. T. Cleve, Swedish chemist, its second discoverer, after his native city) A trivalent, silvery chemical element, one of the rare-earth metals.
Hol"mi*um (?), n. [NL., of uncertain origin.] Chem.
A rare element said to be contained in gadolinite.
© Webster 1913.
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