Definition of thiourea
: a colorless crystalline bitter compound CS(NH2)2 analogous to and resembling urea that is used especially as a photographic and organic chemical reagent; also : a substituted derivative of this compound
Medical Definition of thiourea
: a colorless bitter crystalline compound CS(NH2)2 analogous to and resembling urea that is used especially as a reagent and in medicine as an antithyroid drug—called also thiocarbamide
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