acid

adjective acider · acidest

1. Sour, sharp, or biting to the taste; tart; having the taste of vinegar. acid fruits or liquors
2. figuratively Sour-tempered. His response was harsh and acid.
3. Of or pertaining to an acid; acidic. acid soils
4. Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock.

Similar: acidic · Opposite: alkaline, base

noun acids

1. countable, uncountable A sour substance.
2. countable, uncountable Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid. SE onset depends on a complex network of interactions among plant growth regulators, mainly auxins and cytokinins, during the proembryogenic early stages, and ethylene and gibberellic and abscisic acids later in the development of somatic embryos.
3. countable, uncountable Any compound that easily donates protons to a base; a Brønsted acid.
4. countable, uncountable Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid.
5. countable, uncountable Any corrosive substance. You are in error. / This is terror. / This is your banishment. This land is mine. / This is what you earn. / This is the Law of No Return. / This is the sour dough, this the sweet wine. / This is my history, this my race / And this unhappy man threw acid in my face.
6. slang, uncountable LSD, lysergic acid diethylamide. In the end, though, there is one sure way to distinguish a real hippie from his assorted sympathizers: hippies drop acid. That is, real hippies frequently, if irregularly, ingest LSD.

Similar: acid · Opposite: alkali, base

noun

1. abbreviation, acronym, uncountable Acronym of atomicity, consistency, isolation, and durability, a set of properties that guarantee database transactions are processed reliably. SQLite relies on native file locking and page journaling to implement ACID properties.