(biochemistry) Any carboxylic acid formed by oxidation of the terminal -CH₂OH of an aldose

(obsolete, chemistry) any aldaric acid

(obsolete, chemistry) any uronic acid

(obsolete, organic chemistry) any aldonic acid

(chemistry) any compound formally derived from an oxoacid by replacing the =O with =NNR₂

(chemistry) any compound derived from an oxoacid by replacing the hydroxyl with -NHOH or derivatives

(chemistry) any compound derived from an oxoacid by replacing the =O with =NOH (or =NOR)

(chemistry) Any compound derived from an oxoacid by replacing =O with =NR; they are tautomeric with amides.

(obsolete, chemistry) imidic acid / (organic chemistry) Any carboxylic acid having an imino substituent.

(chemistry) any carboxylic acid derived from a naphthene