(n.) The quality of being sour; sourness; tartness; sharpness to the taste; as, the acidity of lemon juice.

acerbity acescency acid acidness acidulousness acridity acrimony agent alkali alkalinity alloisomer animosity anion antacid asperity astringency atom base bile biochemical bite bitingness bitter resentment bitterness bitterness of spirit cation causticity causticness chemical chemical element choler chromoisomer compound copolymer corrosiveness cuttingness dimer dryness edge element fierceness gall gnashing of teeth greenness grip hard feelings harshness heartburning heavy chemicals high polymer homopolymer hydracid hyperacidity incisiveness inorganic chemical ion isomer keenness macromolecule metamer molecule monomer mordacity mordancy neutralizer nonacid organic chemical oxyacid piercingness piquancy poignancy point polymer pseudoisomer pungency radical rancor rankling reagent rigor roughness severity sharpness slow burn soreness sour sourishness sourness spleen stabbingness sting stridency stringency subacidity sulfacid tartishness tartness teeth trenchancy trimer unripeness unsweetness vehemence verjuice vinegariness vinegarishness violence virulence