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trioxide

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

noun

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


trioxide British  
/ traɪˈɒksaɪd /

noun

  1. 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.

To stabilize the divalent chromium on Earth, researchers maintained high temperatures, almost 2,500 degrees Fahrenheit, under high vacuum during the synthesis that started from chromium metal, chromium trioxide and other chemicals.

From Science Daily • Apr. 16, 2024

These include antimony trioxide, which is often used in plastic production and flame retardants for consumer products, and six haloacetic acids that may be produced during chlorine-based disinfection processes for drinking water.

From Salon • Jan. 12, 2022

The heating process causes the loss of more sulfur trioxide than water, until reaching a concentration of 98.33% acid.

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

It is easily oxidized by heating with concentrated nitric acid to arsenic acid, and with concentrated sulphuric acid to arsenic trioxide; dilute nitric acid only oxidizes it to arsenious acid.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" by Various

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