Dictionary
xe•non
Pronunciation: (zē'non, zen'on), [key]—
n. Chem.
a heavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes.
Symbol: Xe;
at. wt.: 131.30;
at. no.: 54.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.