arsenic trioxide(redirected from Arseneous oxide)
Also found in: Dictionary, Thesaurus, Medical.
Related to Arseneous oxide: White arsenic
arsenic trioxide[′ärs·ən·ik ‚tri′äk‚sīd]
As2O3 A toxic compound, slightly soluble in water; octahedral crystals change to the monoclinic form by heating at 200°C; occurs naturally as arsenolite and claudetite; used in small quantities in some medicinal preparations. Also known as arsenic oxide; arsenious acid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.