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

• full-grown
• full-length
• full-of-the-moon
• full-scale
• full-size
• full-strength
• full-term
• full-time
• full-timer
• full-wave rectifier
• nanotechnology
• nanotube
• nanovolt
• Nansen
• Nantes
• Nanticoke
• Nantua
• Nantucket
• nanus
• Naomi
• naos
• nap
• napa
• Napaea
• Napaea dioica