单词 | ureas |
释义 | urea /ū-rēˈə or ūˈrē-ə/nounCarbamide, CO(NH2)2, a substance found in mammalian urine, the chief form in which nitrogenous waste is excreted and the first natural product to be synthesized ORIGIN: Gr ouron urine urēˈal (or /ūˈri-əl/) or ūrēˈic adjective ureide /ūˈrē-īd/ noun (chem)
ūˈridine noun A pyrimidine nucleoside found in RNA and formed from uracil and ribose urea-formalˈdehyde resin noun A resin produced by condensation of urea with formaldehyde urea resins plural noun Thermosetting resins used eg in adhesive, made by heating urea and aldehyde, usu formaldehyde |
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