HOLMIUM
holmium, Ho, atomic number
(noun) a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
Source: WordNet® 3.1
Etymology
Noun
holmium (usually uncountable, plural holmiums)
A chemical element (symbol Ho) with atomic number 67: a soft and malleable silvery-white metal, too reactive to be found uncombined in nature.
(countable) A single atom of this element.
Source: Wiktionary
Hol"mi*um, n. Etym: [NL., of uncertain origin.] (Chem.)
Definition: A rare element said to be contained in gadolinite.
– Hol"mic, a.
Source: Webster’s Unabridged Dictionary 1913 Edition