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potash

pot·ash [ pót àsh ]


noun 
Definition:
 
1. potassium compound used in fertilizer: a potassium compound, especially potassium chloride, sulfate, or oxide. Use: in fertilizers.

2. chemistry 
Same as  potassium carbonate


3. chemistry 
Same as  potassium hydroxide


[Early 17th century. < obsolete Dutch potasschen (plural) now potasch]
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