The word "polycarboxylic" refers to a compound or molecule that contains multiple carboxylic acid groups (-COOH). Synonyms for polycarboxylic include polyacidic, polycarboxy, multicarboxylic, and multiprotic. These terms emphasize the presence of multiple acid groups and their ability to donate protons or hydrogen ions (H+) in aqueous solution. Polycarboxylic acids are important in many chemical reactions, including polymerization, esterification, and complexation with metal cations. Examples of polycarboxylic acids include citric acid, succinic acid, and tartaric acid, which are widely used in food and beverage industry as flavoring agents and acidulants. In summary, polycarboxylic has various synonyms that describe its characteristic acid properties and diverse applications.