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
   - theory of indicators

Type of: scientific theory

• pinnace
• pinnacle
• pinnate
• pinnate leaf
• pinnate-leafed
• pinnate-leaved
• pinnated
• pinnately
• pinnatifid
• pinnatiped
• pinnatisect
• pinner
• pinning
• pinniped
• pinniped mammal
• Pinnipedia
• Pinnotheres
• Pinnotheres ostreum
• Pinnotheridae
• pinnule
• pinny
• pinochle
• pinocle
• pinocytosis
• pinole