mycomelic

from The Century Dictionary.

• Noting an acid, a gelatinous compound, C₄H₄O₂N₄.½H₂O, prepared by the action of aqueous ammonia on alloxan.

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

• adjective (Chem.) Pertaining to, or designating, a complex nitrogenous acid of the alloxan group, obtained as a honey-yellow powder. Its solutions have a gelatinous consistency.