Source : Webster's Revised Unabridged Dictionary (1913)

Leuconic \Leu*con"ic\ (-k[o^]n"[i^]k), a. [Leuc- + croconic.]
   (Chem.)
   Pertaining to, or designating, a complex organic acid,
   obtained as a yellowish white gum by the oxidation of
   croconic acid.