a chemical, usually a liquid, that contains hydrogen and has a pH of less than seven. The hydrogen can be replaced by a metal to form a salt. Acids usually have a bitter sharp taste and can often burn holes in or damage things they touch.
اسید
see also acetic acid, amino acid, boric acid, citric acid, fatty acid, folic acid, formic acid, hydrochloric acid, lactic acid, nitric acid, nucleic acid, sulphuric acid