1. A dye used as an acid-base indicator
   - bromophenol blue, bromphenol blue

Type of: acid-base indicator, dye, dyestuff

• Raphus cucullatus
• rapid
• Rapid City
• rapid climb
• rapid eye movement
• rapid eye movement sleep
• rapid growth
• rapid transit
• rapid-fire
• rapidity
• rapidly
• rapidness
• rapier
• rapine
• rapist
• Rappahannock
• Rappahannock River
• rapparee
• rappee
• rappel
• rappeller
• rapper
• rapport
• rapporteur
• rapprochement