potash alum

noun Chemistry.

alum¹(def 1).

Origin of potash alum

First recorded in 1830–40

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British Dictionary definitions for potash alum

potash alum

noun

the full name for alum (def. 1)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012