The term “carboxyl” refers to a functional group in organic chemistry characterized by the presence of a carbon atom double-bonded to an oxygen atom (carbonyl group) and also bonded to a hydroxyl group (OH). It is commonly represented as COOH. The carboxyl group is a key component of carboxylic acids, which are organic compounds containing this group. Carboxyl compounds are important in biochemistry and play a significant role in various biological processes, including metabolism.