Compounds having a carboxy group as well as an aldehydic or ketonic group in the same molecule, e.g. HC(=O)CH2CH2CH2C(=O)OH
5-oxopentanoic acid. In an organic context the term is generally shortened to oxo acids. The full name should be used if confusion with oxoacids seems possible.
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1354 (https://doi.org/10.1351/pac199567081307)