potassium carbonate, especially the crude impure form obtained from wood ashes.
the oxide of potassium, K 2 O.
potassium, as carbonate of potash.
another name for potassium carbonate, esp the form obtained by leaching wood ash
another name for potassium hydroxide
potassium chemically combined in certain compounds: chloride of potash
1751, earlier -pot-ashes (1640s), a loan-translation of older Dutch potaschen, literally “pot ashes” (16c.); so called because it was originally obtained by soaking wood ashes in water and evaporating the mixture in an iron pot. Cf. German Pottasche, Danish potaske, Swedish pottaska, all also from Dutch. See also potassium. French potasse (1570s), Italian potassa are Germanic loan-words. The original plural was pot-ashes.
potash pot·ash (pŏt’āsh’)
Any of several chemical compounds that contain potassium, especially potassium carbonate (K2CO3), which is a strongly alkaline material obtained from wood ashes and used in fertilizers.
noun, Chemistry. 1. 1 (def 1). noun 1. the full name for alum (sense 1)
noun 1. any of the feldspar minerals having the composition KAlSi 3 O 8 , as orthoclase. potash feldspar See orthoclase.
[pot-as] /ˈpɒtˌæs/ noun 1. . 2. .
[puh-tas-uh] /pəˈtæs ə/ noun, Chemistry. 1. .