1. (chemistry) the theory that all indicators are either weak acids or weak bases in which the colour of the ionized form is different from the colour before dissociation
   - Ostwald's theory of indicators

Type of: scientific theory

• diopside
• diopter
• dioptre
• dioptric
• dioptrics
• Dior
• diorama
• diorite
• Dioscorea
• Dioscorea alata
• Dioscorea batata
• Dioscorea bulbifera
• Dioscorea elephantipes
• Dioscorea paniculata
• Dioscorea trifida
• Dioscoreaceae
• Diospyros
• Diospyros ebenum
• Diospyros kaki
• Diospyros kurzii
• Diospyros lotus
• Diospyros virginiana
• Diovan
• dioxane
• dioxide