Roche alum
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A kind of alum occuring in small fragments; -- so called fromRocca, in Syria, whence alum is said to have been obtained; -- alsocalled rock alum.
Roche alum meaning & definition 1 of Roche alum.
A kind of alum occuring in small fragments; -- so called fromRocca, in Syria, whence alum is said to have been obtained; -- alsocalled rock alum.