- 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.
acid definition by Webster's New World
- 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: Classical 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
acid definition by American Heritage Dictionary
- 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: From Latin acidus, sour, from acēre, to be sour; see ak- in Indo-European roots.
- acˈid·ly adverb
- acˈid·ness noun
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).
acid - Cultural Definition
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.
- Figuratively, acid applies to anything sour or biting; for example, an “acid wit” is sharp and unpleasant.
acid - Medical Definition
- 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.
- See LSD.
- Of or relating to an acid.
- Having a high concentration of acid.
- Having a sour taste.
acid - Science Definition
- acidic acidic adjective