1

acid

noun

Definition of acid

  1. 1 :  a sour substance; specifically :  any of various typically water-soluble and sour compounds that in solution are capable of reacting with a base (see 1base 7a) to form a salt, redden litmus, and have a pH less than 7, that are hydrogen-containing molecules or ions able to give up a proton to a base, or that are substances able to accept an unshared pair of electrons from a base

  2. 2 :  something incisive, biting, or sarcastic <a social satire dripping with acid>

  3. 3 :  lsd

acidy

\ˈa-sə-dē\ adjective

Examples of acid in a sentence

  1. He washes his windows with an acid solution of vinegar and water.

  2. <with her acid personality, my aunt could be relied upon to bring some much-needed balance to the holiday gush>

Origin and Etymology of acid

see 2acid


First Known Use: 1650

Other Chemical Engineering Terms


2

acid

play
adjective ac·id \ˈa-səd\

Definition of acid

  1. 1a :  sour, sharp, or biting to the taste <an acid flavor>b :  sharp, biting, or sour in manner, disposition, or nature <an acid individual> <an acid personality>c :  sharply clear, discerning, or pointed <an acid wit> <acid criticism>d :  piercingly intense and often jarring <acid yellow>

  2. 2a :  of, relating to, or being an acid; also :  having the reactions or characteristics of an acid <acid soil> <an acid solution>b of salts and esters :  derived by partial exchange of replaceable hydrogen <acid sodium carbonate NaHCO3>c :  containing or involving the use of an acid (as in manufacture) <an acid bath>d :  marked by or resulting from an abnormally high concentration of acid <acid indigestion>

  3. 3 :  relating to or made by a process in which the furnace is lined with acidic material and an acidic slag is used <acid steel>

  4. 4 :  rich in silica <acid rocks>

acidly

adverb

acidness

noun

Examples of acid in a sentence

  1. the acids in your stomach

  2. the kinds of acid found in your stomach

Origin and Etymology of acid

French or Latin; French acide, from Latin acidus, from acēre to be sour — more at acet-


First Known Use: 1649

Other Chemical Engineering Terms



ACID Defined for English Language Learners

1

acid

noun

Definition of acid for English Language Learners

  • : of, relating to, or having the qualities of an acid

  • : sharp, strong, and critical in tone


2

acid

play
adjective ac·id \ˈa-səd\

Definition of acid for English Language Learners

  • chemistry : a chemical with a sour taste that forms a salt when mixed with a base


ACID Defined for Kids

1

acid

play
adjective ac·id \ˈa-səd\

Definition of acid for Students

  1. 1 :  having a taste that is sour, bitter, or stinging

  2. 2 :  harsh or critical in tone <acid remarks>

  3. 3 :  of, relating to, or like an acid <an acid solution>

acidly

adverb <spoke acidly>

2

acid

play
noun

Definition of acid for Students

  1. :  a chemical compound that tastes sour and forms a water solution which turns blue litmus paper red


Medical Dictionary

1

acid

play
adjective ac·id \ˈas-əd\

Medical Definition of acid

  1. 1:  sour, sharp, or biting to the taste

  2. 2a:  of, relating to, or being an acid; also :  having the reactions or characteristics of an acid <an acid solution>bof salts and esters :  derived by partial exchange of replaceable hydrogen <acid sodium carbonate NaHCO3>c:  marked by or resulting from an abnormally high concentration of acid <acid indigestion>—not used technically


2

acid

noun

Medical Definition of acid

  1. 1:  a sour substance; specifically :  any of various typically water-soluble and sour compounds that in solution are capable of reacting with a base to form a salt, that redden litmus, that have a pH less than 7, and that are hydrogen-containing molecules or ions able to give up a proton to a base or are substances able to accept an unshared pair of electrons from a base

  2. 2:  lsd



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