trioxide

[trahy-ok-sahyd, -sid]

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. 2018

Examples from the Web for trioxide

Historical Examples of trioxide

An impure oxysulphide of antimony, with variable portions of trioxide, and undecomposed tersulphide.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I
Arnold Cooley
A mixture of trioxide of antimony, sulphide of potassium, carbonate of potassium, and undecomposed trisulphide of antimony.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I
Arnold Cooley
Pure antimony is quite permanent in air at ordinary temperatures, but when heated in air or oxygen it burns, forming the trioxide.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2
Various
Arsenic trioxide has been known from the earliest times, and was called Httenrauch (furnace-smoke) by Basil Valentine.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6
Various
Arsenic burns on heating in a current of oxygen, with a pale lavender-coloured flame, forming the trioxide.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6
Various

British Dictionary definitions for trioxide

trioxide

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

trioxide in Medicine

trioxide

[trī-ŏk′sīd′]

An oxide containing three oxygen atoms per molecule.