|1.||See also Lewis acid any substance that dissociates in water to yield a sour corrosive solution containing hydrogen ions, having a pH of less than 7, and turning litmus red|
|2.||a sour-tasting substance|
|3.||a slang name for LSD|
|a. of, derived from, or containing acid: an acid radical|
|b. being or having the properties of an acid: sodium bicarbonate is an acid salt|
|5.||sharp or sour in taste|
|6.||cutting, sharp, or hurtful in speech, manner, etc; vitriolic; caustic|
|7.||(of rain, snow, etc) containing pollutant acids in solution|
|8.||(of igneous rocks) having a silica content of more than 60% of the total and containing at least one tenth quartz|
|9.||metallurgy of or made by a process in which the furnace or converter is lined with an acid material: acid steel|
|[C17: (first used by Francis Bacon): from French acide or Latin acidus, from acēre to be sour or sharp]|
When I was on acid I would see things that looked like beams of light, and I would hear things that sounded an awful lot like car horns. [Mitch Hedberg, 1968-2005, U.S. stand-up comic]
acid ac·id (ās'ĭd)
Any of a large class of sour-tasting substances whose aqueous solutions are capable of turning blue litmus indicators red, of reacting with and dissolving certain metals to form salts, and of reacting with bases or alkalis to form salts.
A substance that ionizes in solution to give the positive ion of the solvent.
A substance capable of yielding hydrogen ions.
A proton donor.
An electron acceptor.
A molecule or ion that can combine with another by forming a covalent bond with two electrons of the other.
A substance having a sour taste.
Of or relating to an acid.
Having a high concentration of acid.
Having a sour taste.
|acid (ās'ĭd) Pronunciation Key
Any of a class of compounds that form hydrogen ions when dissolved in water, and whose aqueous solutions react with bases and certain metals to form salts. Acids turn blue litmus paper red and have a pH of less than 7. Their aqueous solutions have a sour taste. Compare base.
A sour-tasting material (usually in a solution) that dissolves metals and other materials. Technically, a material that produces positive ions in solution. An acid is the opposite of a base and has a pH of 0 to 7. A given amount of an acid added to the same amount of a base neutralizes the base, producing water and a salt. Common vinegar, for example, is a weak solution of acetic acid.
Note: Figuratively, acid applies to anything sour or biting; for example, an “acid wit” is sharp and unpleasant.