Word Study
potash alum
WORDNET DICTIONARY
Noun potash alum has 1 sense
- potash alum(n = noun.substance) alum, potassium alum - a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum; Array is a kind of al, aluminium, aluminum, atomic number 13, double salt
For further exploring for "potash alum" in Webster Dictionary Online