2acid adjective
[more acid; most acid] 1 always used before a noun : of, relating to, or having the qualities of an acid
▪ He washes his windows with an acid solution of vinegar and water. ▪ an acid [=sour] taste ▪ This kind of plant grows well in acid [=acidic] soil. ▪ Their pizza gives me acid indigestion. [=a burning feeling in the stomach] 2 : sharp, strong, and critical in tone
▪ He made some very acid [=biting, caustic] comments. ▪ acid remarks
▪ He washes his windows with an acid solution of vinegar and water. ▪ an acid [=sour] taste ▪ This kind of plant grows well in acid [=acidic] soil. ▪ Their pizza gives me acid indigestion. [=a burning feeling in the stomach]
▪ He made some very acid [=biting, caustic] comments. ▪ acid remarks
— acid·i·ty 
/əˈsɪdəti/ noun [noncount]
▪ They measured the acidity of the soil. ▪ the acidity [=tartness, sourness] of lemon juice
/əˈsɪdəti/ noun [noncount] ▪ They measured the acidity of the soil. ▪ the acidity [=tartness, sourness] of lemon juice
— ac·id·ly adverb
▪ She acidly refers to her former husband as “that little man.”
▪ She acidly refers to her former husband as “that little man.”
