trioxide

[ trahy-ok-sahyd, -sid ]

/ traɪˈɒk saɪd, -sɪd /

an oxide containing three oxygen atoms, as As2O3.

Origin of trioxide

First recorded in 1865–70; tri- + oxide

When heated to a higher temperature chromic hydroxide is completely dehydrated, forming the trioxide Cr2O3.

An Elementary Study of Chemistry |William McPherson
It is weighed when cold, and is the trioxide or "tungstic acid" (WO3), which contains 79.31 per cent.

A Textbook of Assaying: For the Use of Those Connected with Mines. |Cornelius Beringer and John Jacob Beringer
The Flowers of Antimony is an impure oxysulphide of antimony, with variable proportions of trioxide and undecomposed trisulphide.

Poisons: Their Effects and Detection |Alexander Wynter Blyth
The quantity of the borate taken should contain not more than 0.2 gram of the trioxide.

A Textbook of Assaying: For the Use of Those Connected with Mines. |Cornelius Beringer and John Jacob Beringer

All molybdenum compounds are converted into the trioxide by boiling with nitric acid.

A Textbook of Assaying: For the Use of Those Connected with Mines. |Cornelius Beringer and John Jacob Beringer

trioxide

/ (traɪˈɒksaɪd) /

any oxide that contains three oxygen atoms per molecule sulphur trioxide, SO 3

trioxide

[ trī-ŏk′sīd′ ]

An oxide containing three oxygen atoms per molecule.