资料来源 : pyDict

双缩

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Biuret \Bi"u*ret\, n. [Pref. bi- + urea.] (Chem.)
   A white, crystalline, nitrogenous substance, {C2O2N3H5},
   formed by heating urea. It is intermediate between urea and
   cyanuric acid.