- a group of minerals, hydrous silicates of aluminum, ferrous iron, and magnesium, occurring in green platelike crystals or scales.
- a salt of chlorous acid, as potassium chlorite, KClO2.
- any of a group of green soft secondary minerals consisting of the hydrated silicates of aluminium, iron, and magnesium in monoclinic crystalline form: common in metamorphic rocks
- any salt of chlorous acid, containing the monovalent ion ClO 2 –
