- Acid is defined as something that has a sour taste, or something that has a pH of less than 7 in chemistry.
Lemon is an example of an acid substance.
- The definition of acid is sour or sharp in taste, or having a pH of under 7 in chemistry.
Lemon juice and vinegar are each an example of an acid.
Vinegar is an acid.
- sharp and biting to the taste; sour; tart
- sharp or sarcastic in temperament or speech
- that is, or has the properties of, an acid
- having too heavy a concentration of acid
Origin of acidClassical Latin acidus, sour ; from Indo-European base an unverified form a-, sharp, pointed from source ear
- a sour substance
- Slang LSD
- Chem. any compound that can react with a base to form a salt, the hydrogen of the acid being replaced by a positive ion; in modern theory, any substance that produces a positive ion and accepts electrons from a base to form covalent bonds: in water solution an acid tastes sour, turns blue litmus paper red, and, in the dissociation theory, produces free hydrogen ions
- Chemistry a. Any of a class of substances whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals to form salts.b. A substance that yields hydrogen ions when dissolved in water.c. A substance that can act as a proton donor.d. A substance that can accept a pair of electrons to form a covalent bond.
- A substance having a sour taste.
- The quality of being sarcastic, bitter, or scornful: wrote with acid about her first marriage.
- Slang See LSD1.
- Chemistry a. Of, relating to, or containing an acid.b. Having a high concentration of acid.c. Having the characteristics of an acid.
- a. Having a pH of less than 7.b. Having a relatively high concentration of hydrogen ions.
- Geology Containing a large proportion of silica: acid rocks.
- Having a sour taste. See Synonyms at sour.
- Biting, sarcastic, or scornful: an acid wit; an acid tone of voice.
Origin of acidFrom Latin acidus, sour, from acēre, to be sour; see ak- in Indo-European roots.
acid - Computer Definition
(Atomic, Consistent, Isolated, Durable) The properties of a transaction in a well-designed database management system (DBMS). The transaction must be ATOMIC (all updating tasks must be completed or nothing is done), CONSISTENT (it cannot leave the database in a state that violates any integrity rules), ISOLATED (remain invisible to other operations until completed) and DURABLE (will complete or be reversed if the system fails in the interim).