Pronunciation: (tek-nē'shē-um, -shum), [key]
Chem.an element of the manganese family, not found in nature, but obtained in the fission of uranium or by the bombardment of molybdenum. Symbol: Tc; at. wt.: 99; at. no.: 43; sp. gr.: 11.5.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.