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   acid

   /ˈasɪd/

   noun

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

   adjective

   • 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" Similar acidicsourtartbitterunsweetenedsharpbitingacridpungentacerbicvinegaryvinegarishaceticacetousrare:acidulousacidulatedOpposite sweet
   • ▪ (of a person's remarks or tone) bitter or cutting: "she was stung into acid defiance" Similar acerbicsarcasticsharpsardonicsatiricalscathingcuttingrazor-edgedincisivepenetratingpiercingbitingstingingsearingkeencaustictrenchantmordantbitteracrimoniousastringentharshsevereabrasivewoundinghurtfulunkindcruelvitriolicvirulentvenomouspoisonouswaspishspitefulviciousmaliciousacerbinformal:bitchycattysarkysnarkyrare:mordaciousacidulousOpposite kindpleasantcomplimentary
   • ▪ (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"

   Word Origin early 17th century (in the sense ‘sour-tasting’): from Latin acidus, from acere ‘be sour’.

   Derivatives

   • 1. acidy adjective
   • 2. acidness noun

   Scrabble Points: 7

   • A

     1

   • C

     3

   • I

     1

   • D

     2

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