sesquioxide

American  

[ses-kwee-ok-sahyd, -sid] / ˌsɛs kwiˈɒk saɪd, -sɪd /

noun

Chemistry.

1. an oxide containing three atoms of oxygen and two of another element, as aluminum oxide, Al 2 O 3 .

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sesquioxide British  

/ ˌsɛskwɪˈɒksaɪd /

noun

1. any of certain oxides whose molecules contain three atoms of oxygen for every two atoms of the element

   chromium sesquioxide, Cr2O3

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Etymology

Origin of sesquioxide

First recorded in 1825–35; sesqui- + oxide

Example Sentences

See Examples For:

sesquioxide

Several shallow, saucer-like vessels contained yellow ocher, and others sesquioxide of iron, which afforded both the ancients and the moderns the red pigment called cuta, an especial favorite of the warrior societies.

From Archeological Expedition to Arizona in 1895 Seventeenth Annual Report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution, 1895-1896, Government Printing Office, Washington, 1898, pages 519-744 by Jesse Walter Fewkes

The colouring matter of which is sesquioxide of iron, is used as a crayon.

From Field's Chromatography or Treatise on Colours and Pigments as Used by Artists by Thomas Salter

Appended are two analyses of pyrolusite containing sesquioxide of iron.

From British Manufacturing Industries Pottery, Glass and Silicates, Furniture and Woodwork. by L. Arnoux

The gold is about 20 or 21 carats fine, and often shows traces of iron sesquioxide.

From The Romance of Industry and Invention by Robert Cochrane

Three characteristic oxides of cobalt are known, the monoxide, CoO, the sesquioxide, Co2O3, and tricobalt tetroxide, Co3O4; besides these there are probably oxides of composition CoO2, Co8O9, Co6O7 and Co4O5.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" by Various