thoria

[thawr-ee-uh, thohr-]

noun Chemistry.

a white, heavy, water-insoluble powder, ThO2, used chiefly in incandescent mantles, as the Welsbach gas mantle.

Nearby words

  1. thoreau, henry david,
  2. thoreauvian,
  3. thorez,
  4. thorez, maurice,
  5. thorfinn karlsefni,
  6. thorianite,
  7. thoric,
  8. thorite,
  9. thorium,
  10. thorium dioxide

Origin of thoria

First recorded in 1835–45; thori(um) + -a4

Also called thorium oxide, thorium dioxide.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for thorium dioxide

thorium dioxide

noun

a heavy insoluble white powder used in incandescent mantles. Formula: ThO 2Also called: thoria

thoria

noun

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