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, college, or university. It is often used in the context of alumni associations, which are organizations for former students of an educational institution. These associations typically aim to foster connections among graduates, support the institution through fundraising, and provide networking opportunities. The misspelling of "alumnus" as "alumus" can occur due to phonetic similarity. Without further context, it is difficult to determine the precise meaning of "alumus" if it is encountered.