alum

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
  2. noun a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
  3. noun a person who has received a degree from a school (high school or college or university)

Etymology

From Middle English alum, alum, alym, alyme, from Anglo-Norman alum, alun, from Latin alūmen.

In classic literature

Synonyms

ammonia alum, ammonium alum

A single word — an entire dictionary opens.

Type a word, a sentence, a book title, or a link to an English article. WordNet and the Classics answer.

Try

A library of classics · a vault of words · instant etymology & meaning

Continue reading