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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.

See Examples For:

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

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

Pure sulfuric acid is a colorless, oily liquid that freezes at 10.5 °C. It fumes when heated because the acid decomposes to water and sulfur trioxide.

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

Similarly, spongy platinum accelerates the oxidation of sulfur dioxide to sulfur trioxide, in the commercial manufacture of sulfuric acid.

From The Chemistry of Plant Life by Roscoe Wilfred Thatcher

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