urea /ū-rēˈə or ūˈrē-ə/

Carbamide, 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

urēˈal (or /ūˈri-əl/) or ūrēˈic adjective

ureide /ūˈrē-īd/ noun (chem)

1. Any of several organic compounds derived from urea
2. An acyl derivative of urea, such as urethan

ūˈridine noun

A pyrimidine nucleoside found in RNA and formed from uracil and ribose

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