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Related to trioxid: sulfur trioxide


 (trī-ŏk′sīd′) also tri·ox·id (-ŏk′sĭd)
An oxide containing three oxygen atoms per molecule.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Elements & Compounds) any oxide that contains three oxygen atoms per molecule: sulphur trioxide, SO3.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(traɪˈɒk saɪd, -sɪd)

an oxide containing three oxygen atoms, as As2O3.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.trioxide - an oxide containing three atoms of oxygen in the moleculetrioxide - an oxide containing three atoms of oxygen in the molecule
arsenic, arsenic trioxide, arsenous anhydride, arsenous oxide, ratsbane, white arsenic - a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
oxide - any compound of oxygen with another element or a radical
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