Dictionary
man•ga•nese
Pronunciation: (mang'gu-nēs", -nēz"), [key]—
n. Chem.
a hard, brittle, grayish-white, metallic element, an oxide of which, MnO
2 (man'ganese diox'ide), is a valuable oxidizing agent: used chiefly as an alloying agent in steel to give it toughness.
Symbol: Mn;
at. wt.: 54.938;
at. no.: 25;
sp. gr.: 7.2 at 20°C.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.