[′as·əd rē′ak·shən] (chemistry) A chemical reaction produced by an acid.
acid reaction
ac·id re·ac·tion
1. any test by which an acid reaction is recognized, such as the change of blue litmus paper to red; 2. an excess of hydrogen ions over hydroxide ions in aqueous solution indicated by a pH value less than 7 (at 22°C). Compare: dissociation constant of water.