Wiktionary
aldaric acid
n. (context carbohydrate English) Any of a group of polyhydroxy dicarboxylic acids derived from an aldose by oxidation at both terminal carbon atoms.
Wikipedia
Aldaric acid
Aldaric acids are a group of sugar acids, where the terminal hydroxyl groups of the sugars have been replaced by terminal carboxylic acids, and are characterised by the formula HOOC-(CHOH)-COOH.