potash alum
Alum, hydrated potassium aluminium sulphate, formula K₂SO₄.Al₂₃.24H₂OAlum, hydrated potassium aluminium sulphate, formula K₂SO₄.Al₂(SO₄)₃.24H₂O
Meaning
1 senses(uncountable)Alum, hydrated potassium aluminium sulphate, formula K₂SO₄.Al₂(SO₄)₃.24H₂O
More definitions
- a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Origin
From potash + alum.From potash + alum.
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Synonyms
2 synonymsClose in meaning
- a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum:alum-npotassium alum
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable