trioxide

American  

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

noun

Chemistry.

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

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trioxide British  

/ traɪˈɒksaɪd /

noun

1. any oxide that contains three oxygen atoms per molecule

   sulphur trioxide, SO3

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Etymology

Origin of trioxide

First recorded in 1865–70; tri- + oxide

Example Sentences

"It may be that in normal conditions phosphorus is bound up in another molecule such as phosphorus trioxide," explained Beiler.

From Science Daily

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

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

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

From Salon

The safety data sheet for Instantaneous Blast says that it contains diiron trioxide, magnesium oxide, zinc metal, potassium perchlorate, aluminum powder zirconium powder, and lead dithiocyanate, among other metallic compounds.

From Salon