<chemistry> Of, pertaining to, or designating, an acid, C4H7N3O2, obtained, by the action of the vapor of cyanic acid on cold aldehyde, as a white crystalline substance having a slightly acid taste and faint smell.

Synonyms: ethidene- or ethylidene-biuret.

Origin: Pref. Tri- + gen- + -ic. So named in reference to its composition, it being supposed to contain the radicals of three molecules of cyanic acid.

(01 Mar 1998)