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

• pertinently
• pertly
• pertness
• perturb
• strong-growing
• strong-minded
• strong-scented
• strong-smelling
• strong-willed
• strongbox
• stronghold
• strongly
• strongman
• strongroom
• Strongylodon
• Strongylodon macrobotrys
• strontia
• strontianite
• strontium
• strontium 90
• strop
• strophanthin
• strophanthus
• Strophanthus kombe
• Stropharia