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diureide

diureide Chem.
  (daɪˈjʊəriːaɪd)
  [f. di-2 + ureide.]
  A compound of two urea-residues with an acid radical.

1877 Watts Fownes' Chem. II. 400 The 4- and 5-carbon diureides (including uric acid itself) are formed by the union of one molecule of a bibasic acid and 2 molecules of urea, with elimination of 4 molecules of water, and accordingly contain one diatomic acid residue and two urea-residues, CO·2(NH).

Oxford English Dictionary

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