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Dictionary

di•ox•ide

Pronunciation: (dī-ok'sīd, -sid), [key]
—n. Chem.
an oxide containing two atoms of oxygen, each of which is bonded directly to an atom of a second element, as manganese dioxide, MnO₂, or nitrogen dioxide, NO₂.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

dioxane

dioxin

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