leuconic

from The Century Dictionary.

• Noting an acid, a colorless sweet compound, C₅H₈O₉, prepared by the action of chlorin or nitric acid on an alkali croconate. It crystallizes, with 1H₂O, in small needles which become anhydrous at 100° C.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Chem.) Pertaining to, or designating, a complex organic acid, obtained as a yellowish white gum by the oxidation of croconic acid.