acid

Reading level: hard

Estimated CEFR level: C1 — Advanced

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
  2. noun street name for lysergic acid diethylamide
  3. adjective harsh or corrosive in tone

Etymology

From French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita.

In classic literature

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