Sesquioxide meaning

seskwēäksīd
An oxide in which three atoms or equivalents of oxygen are combined with two of some other element or radical.
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(chemistry) Any oxide containing three oxygen atoms for every two atoms of another element.
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Origin of sesquioxide

  • sesqui- (“one and a half, a ratio of three to two") +"Ž oxide.

    From Wiktionary