potash alum

[ pot-ash al-uhm ]

noun

, Chemistry.

1. alum ¹( def 1 ).

potash alum

noun

1. See alum
   the full name for alum

Word History and Origins

Origin of potash alum¹

First recorded in 1830–40

Example Sentences

It is quite a matter of indifference to the photographer whether he uses potash alum or ammonia alum.

From Project Gutenberg

The rule indicates, also, that aluminium chloride would be better than the sulphate or than potash alum.

From Project Gutenberg

Common alum is strictly potash alum; other two varieties are soda alum and ammonia alum, both similar in properties.

From Project Gutenberg

This was the common potash alum and uncombined with any carbonated alkali, and it passed into the stomach unchanged.

From Project Gutenberg