noun
1. : an alum containing iron as the trivalent constituent ; especially : ammonium ferric alum NH 4 Fe(SO 4 ) 2 .12H 2 O
2.
[ alum (I) (aluminum sulfate)]
: halotrichite
noun
1. : an alum containing iron as the trivalent constituent ; especially : ammonium ferric alum NH 4 Fe(SO 4 ) 2 .12H 2 O
2.
[ alum (I) (aluminum sulfate)]
: halotrichite
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012