acid /asˈid/

1. A substance with a sour taste
2. Any of a class of substances which turn vegetable blues (eg litmus) red, and combine with bases, certain metals, etc, to form salts (chem)
3. Any of a class of substances that dissolve in water with the formation of hydrogen ions (chem)
4. Any of a class of substances that can transfer a proton to another substance, etc (chem)
5. Something harsh, biting, or sarcastic (figurative)
6. LSD (slang)
7. Short form of acid house (see below)

1. Relating to, of the nature of, or having the properties of an acid (chem)
2. Sharp
3. Sour
4. (of soil) having an acid reaction
5. Biting, keen (figurative)
6. Ill-natured, morose (figurative)
7. Containing a large proportion of silica (geology)
8. Relating to acid house

acidˈic adjective

acidˈically adverb

acidifīˈable adjective

acidificāˈtion noun

acidˈifier noun

acidˈify transitive verb

1. To make acid
2. To convert into an acid

To become acid

acidimˈeter noun

An apparatus for performing acidimetry

acidimˈetry noun

Measurement of the concentration of acids by titration with a standard solution of alkali

acidˈity noun

1. The quality of being acid or sour
2. The extent to which a solution is acid (see pH)

acˈidly adverb

acˈidness noun

acidˈophil noun

An acidophilic cell

acidophilic /-filˈik/ adjective

1. (of a cell) easily stained with acid dyes
2. (of micro-organisms or plants) flourishing in an acidic environment

acidōˈsis noun (medicine)

The presence of acids in the blood beyond normal limits

acidˈūlate transitive verb

To make slightly acid

acidˈūlous or acidˈūlent adjective

1. Slightly sour
2. Subacid
3. (of eg mineral waters) containing carbonic acid
4. Caustic or sharp (figurative)

acˈidy adjective

1. Resembling acid
2. Sharp, bitter

acid drop noun

A sweet flavoured with tartaric acid

acid dye noun

A dyestuff with acid properties

acid freak or acˈid-head noun (drug sl)

A person who takes LSD habitually

acid house noun

(sometimes with caps) a youth movement originating in the 1980s, involving large gatherings of people to dance under bright flashing lights to loud repetitive music featuring complex percussion patterns, and often associated with the use of certain drugs, esp Ecstasy

acid-houseˈ adjective

acid jazz noun

A form of jazz influenced by acid rock

acid rain noun

Rain or other forms of precipitation containing sulphur and nitrogen compounds and other pollutants released by the combustion of fossil fuels in industrial processes

acid reflux noun

The regurgitation of acid from the stomach into the oesophagus

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