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Acid

ˈasɪd

Acid definitions
noun
acid acids
  1. a substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind

    "trees were exposed to mixtures of heavy metals, acids, and overdoses of nutrients"

    • bitter or cutting remarks or tone of voice

      "she was unable to quell the acid in her voice"

  2. a molecule or other species which can donate a proton or accept an electron pair in reactions
  3. the drug LSD

    "she didn't have a clue the sweet had acid in it"

adjective
acid
  1. containing acid or having the properties of an acid; having a pH of less than 7

    "acid soils"

  2. sharp-tasting or sour

    "acid fruit"

    • (of a person's remarks or tone) bitter or cutting

      "she was stung into acid defiance"

    • (of a colour) strikingly intense or bright

      "an acid green"

  3. (of rock, especially lava) containing a relatively high proportion of silica

    "the magma may start off fairly basic and end up at the close of the eruption much more acid"

    • relating to or denoting steel-making processes involving silica-rich refractories and slags

      "the acid Bessemer process"