thoria definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a white, powdery form of thorium dioxide, ThO, used esp. in gas mantles and in making refractory crucibles
Origin: Modern Latin ; from Swedish Thorjord, literally , Thor-earth (so named by Baron Jöns Jakob Berzelius): see thorium
thoria definition by American Heritage Dictionary
See thorium dioxide.
Origin: From thorium.