(chemistry) The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required.

Slightly sour; sub-acid; sourish. / (figuratively) Sharp; caustic. / Containing carbonic acid.

(transitive) To make slightly or moderately acid; to acidify. / (transitive) To make sour in a moderate degree; to sour somewhat.

(chemistry) A simple or compound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc.

(slang, derogatory) A person who uses the hallucinogenic drug LSD.

Third-person singular simple present indicative form of acidify

present participle of acidify

plural of acidhead

simple past tense and past participle of acidulate

simple past tense and past participle of acidify