1. Any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
   - base 
2. A mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture

Derived forms: alkalies, alkalis

See also: alkalic, alkalize

Type of: chemical compound, compound, salt

Encyclopedia: Alkali

• upper respiratory infection
• upper respiratory tract
• upper side
• upper surface
• Upper Tunguska
• Upper Volta
• upper-case letter
• upper-class
• upper-level
• upper-lower-class
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• Upper-Normandy
• uppercase
• uppercut
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• UPPP
• Uppsala
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