Longman Dictionary of Contemporary English homepage

Topic: CHEMISTRY

Date: 1600-1700
Origin: pot + ash; because it was made by putting ash in water and letting it dry out in pots

potash

 noun
     
pot‧ash [uncountable]
HCTA a type of potassium used especially in farming to make the soil better
Definition of potash from the Longman Dictionary of Contemporary English within
the topic CHEMISTRY
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