aldaric acids

Polyhydroxy dicarboxylic acids having the general formula HOC(=O)[CH(OH)]nC(=O)OH , formally derived from an aldose by oxidation of both terminal carbon atoms to carboxyl groups.
Source:
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1312
White Book, p. 142