Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry any oxide containing seven oxygen atoms in each molecule

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

hepta- +‎ oxide

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Examples

  • The sulfuric acid and the permanganate react to form manganese heptoxide, which explodes when it comes into contact with the alcohol or acetone.

    About.com Chemistry 2009

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