Inside the Universes

'acid'

[acid.n.01] as in: 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

'acid'

[acid.n.02] as in: street name for lysergic acid diethylamide

'acid'

[acerb.s.02] as in: harsh or corrosive in tone

Examples:
an acerbic tone piercing otherwise flowery prose
a barrage of acid comments
her acrid remarks make her many enemies
bitter words
blistering criticism
caustic jokes about political assassination, talk-show hosts and medical ethics
a sulfurous denunciation
a vitriolic critique

'acid'

[acidic.s.01] as in: being sour to the taste

'acid'

[acid.s.03] as in: having the characteristics of an acid

Examples:
an acid reaction

Origins

					acid (English)
└── acide (French)
    ├── acidus (French)
    │   └── aceo (Latin)
    └── acidus (Latin)