trioxide

[ trahy-ok-sahyd, -sid ]
/ traɪˈɒk saɪd, -sɪd /
|

noun Chemistry.

an oxide containing three oxygen atoms, as As2O3.

Origin of trioxide

First recorded in 1865–70; tri- + oxide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for trioxide

trioxide

/ (traɪˈɒksaɪd) /

noun

any oxide that contains three oxygen atoms per moleculesulphur trioxide, SO 3
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

Medicine definitions for trioxide

trioxide

[ trī-ŏksīd′ ]

n.

An oxide containing three oxygen atoms per molecule.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.