trioxide

American

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

noun

Chemistry.

an oxide containing three oxygen atoms, as As 2 O 3 .

trioxide British

/ traɪˈɒksaɪd /

noun

any oxide that contains three oxygen atoms per molecule

sulphur trioxide, SO3

"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

Etymology

Origin of trioxide

First recorded in 1865–70; tri- + oxide

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Researchers at Tampere University have discovered that sulfur trioxide can form products other than sulfuric acid in the atmosphere by interacting with organic and inorganic acids.

From Science Daily • May 23, 2024

Both antimony trioxide and the suite of haloacetic acids have previously been recognized by state and federal agencies as hazardous substances.

From Salon • Jan. 12, 2022

Dinitrogen trioxide exists only in the liquid and solid states.

From Textbooks • Feb. 14, 2019

In the form of arsenic trioxide, it can be used to treat acute promyelocytic leukemia, the book says.

From Washington Post • Jun. 10, 2013

For example take the oxides of nitrogen, N2O, NO, N2O3, NO2, N2O5; these are known respectively as nitrous oxide, nitric oxide, nitrogen trioxide, nitrogen peroxide and nitrogen pentoxide.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023