Dictionary
yt•ter•bi•um
Pronunciation: (i-tûr'bē-um), [key]—
n. Chem.
a rare metallic element found in gadolinite and forming compounds resembling those of yttrium.
Symbol: Yb;
at. wt.: 173.04;
at. no.: 70;
sp. gr.: 6.96. Cf.
rare-earth element. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.