• Webster's Revised Unabridged Dictionary
    • n Diureide (Chem) 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.
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Century Dictionary and Cyclopedia
    • n diureide One of a class of organic compounds, such as uric acid, which contain two ureide radicals in the molecule. These substances are of interest in connection with the metabolism of birds and reptiles, which excrete their nitrogenous material largely in the form of diureides.
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Webster's Revised Unabridged Dictionary
Di-, + ureide,