Dictionary
hol•mi•um
Pronunciation: (hōl'mē-um), [key]—
n. Chem.
a rare-earth, trivalent element found in gadolinite.
Symbol: Ho;
at. wt.: 164.930;
at. no.: 67.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.