alum
noun
- family of double sulfate salts of monovalent and trivalent cations
Wiktionary
Pronunciation: /əˈlʌm/ / /ˈæl.əm/
noun
Etymology: Clipping of alumnus and alumna (> alumn- > alum), by the removal of the originally Latin gender-specific nominative singular case endings -us (masculine) and -a (feminine).
- A past attendee or graduate (of any gender) of a college, university or other educational institution.
“1961 Spring, Anchora of Delta Gamma, Volume LXXVII, No. 3, page 59, Evanston-North Shore alums are happy to open their homes to Sigma actives for special social events.”
“You'll remember that we're starting with a list of slightly over 7,000 names that are alums (most of them over 50) that we'd like to whittle down to a manageable list of prospects.”
verb
Etymology: From Middle English alum, alum, alym, alyme, from Anglo-Norman alum, alun, from Latin alūmen.
- To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.
“The silk should be boiled at the rate of 20 parts of soap per cent. , and then alumed. The aluming need not be so strong as for the fine crimson”
“After drying, the cloth was alumed and finally dyed.”