• (n.) One of a series of complex nitrogenous substances regarded as containing two molecules of urea or their radicals, as uric acid or allantoin. Cf. Ureide.
Di·u're·ide noun [ Di- + ureide .] (Chemistry) One of a series of complex nitrogenous substances regarded as containing two molecules of urea or their radicals, as uric acid or allantoin. Confer Ureide .