1. A laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colourless below pH 8

Derived forms: phenolphthaleins

Type of: acid-base indicator, laxative

Encyclopedia: Phenolphthalein

• line of force
• line of gab
• line of heart
• line of inquiry
• line of latitude
• line of least resistance
• line of life
• line of longitude
• line of march
• line of merchandise
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• line of products
• line of questioning
• line of reasoning
• line of Saturn
• line of scrimmage
• line of sight
• line of succession
• line of thought
• line of verse
• line of vision
• line of work
• line officer
• line one's pockets
• line organisation