alumus
Alumus is a term that can refer to several different things, most commonly a type of aluminum compound or a misspelling of the word "alumnus." In chemistry, alum, often written as "alumus" colloquially, refers to hydrated double sulfate salts of aluminum. The most common type is potassium aluminum sulfate, with the chemical formula KAl(SO4)2·12H2O. Alums have various industrial and domestic uses, including water purification, as a mordant in dyeing, in tanning leather, and as an astringent.
The term "alumnus" (plural: alumni) is derived from Latin and refers to a graduate of a school,