- a white, heavy, water-insoluble powder, ThO2, used chiefly in incandescent mantles, as the Welsbach gas mantle.
Origin of thoria
Also called thorium oxide, thorium dioxide.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a heavy insoluble white powder used in incandescent mantles. Formula: ThO 2Also called: thoria
- another name for thorium dioxide
Word Origin for thoria
C19: thorium + -a, on the model of magnesia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012