a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
A chemical element (symbol Ho) with atomic number 67: a soft and malleable silvery-white metal, too reactive to be found uncombined in nature.
The name holmium comes from the Latin word Holmia, which means Stockholm. It was named after Stockholm because it is the hometown of Per Teodor Cleve, one of the element's discoverers.