Dictionary
yt•tri•um
Pronunciation: (i'trē-um), [key]—
n. Chem.
a rare trivalent metallic element, found in gadolinite and other minerals.
Symbol: Y;
at. wt.: 88.905;
at. no.: 39;
sp. gr.: 4.47. Cf.
rare-earth element. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.