a trivalent, silvery chemical element, one of the rare-earth elements: symbol, Ho; at. no., 67
See holmium in American Heritage Dictionary 4
(hōlˈmē-əm)
noun Symbol Ho
A relatively soft, malleable, stable rare-earth element occurring in gadolinite, monazite, and other rare-earth minerals. Atomic number 67; atomic weight 164.930; melting point 1,461°C; boiling point 2,600°C; specific gravity 8.803; valence 3. See Table at element.