ozonide

1. (chemistry) the univalent anion, O₃⁻, derived from ozone

2. (chemistry) any dark red salt of this anion and a metal

3. (chemistry) any of a number of explosive organic compounds containing a -O-O-O- group

4. (chemistry) any of a class of heterocycles, containing two carbon atoms (in positions 3 and 5) and three oxygen atoms (in positions 1, 2 and 4) produced by the reaction of ozone with a carbon to carbon double bond; the 1,2,4-trioxolanes