Potash-alum
noun, Chemistry.
1.
1 (def 1).
noun
1.
the full name for alum (sense 1)
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[puh-tas-ee-uh m] /pəˈtæs i əm/ noun, Chemistry. 1. a silvery-white metallic element that oxidizes rapidly in the air and whose compounds are used as fertilizer and in special hard glasses. Symbol: K; atomic weight: 39.102; atomic number: 19; specific gravity: 0.86 at 20°C. /pəˈtæsɪəm/ noun 1. a light silvery element of the alkali metal group […]