Dictionary
thal•li•um
Pronunciation: (thal'ē-um), [key]—
n. Chem.
a soft, malleable, rare, bluish-white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides.
Symbol: Tl;
at. wt.: 204.37;
at. no.: 81;
sp. gr.: 11.85 at 20°C.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.