Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any oxide containing three oxygen atoms for every two atoms of another element.

from the GNU version of the Collaborative International Dictionary of English

  • n. An oxide containing three atoms of oxygen with two atoms (or radicals) of some other substance.

Etymologies

sesqui- (“one and a half, a ratio of three to two”) +‎ oxide. (Wiktionary)

Examples

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