单词	pyrrole
释义	pyrrole noun pyr·​role ˈpir-ˌōl  : a toxic liquid heterocyclic compound C4H5N that has a ring consisting of four carbon atoms and one nitrogen atom, polymerizes readily in air, and is the parent compound of many biologically important substances (such as bile pigments, porphyrins, and chlorophyll) broadly : a derivative of pyrrole pyrrolic pi-ˈrō-lik  adjective Example Sentences Recent Examples on the Web Researchers were able to contest the authenticity of the works by proving pigments used in the paintings, like the lightfast pyrrole red, PR 254, had not even been discovered until after Pollock’s death in 1956. Jackie Mansky, Smithsonian, 14 Mar. 2018 Word History Etymology Greek pyrrhos First Known Use 1835, in the meaning defined above Medical Definition pyrrole noun pyr·​role ˈpi(ə)r-ˌōl  : a toxic liquid heterocyclic compound C4H5N that has a ring consisting of four carbon atoms and one nitrogen atom, polymerizes readily in air, and is the parent compound of many biologically important substances (as bile pigments, porphyrins, and chlorophyll) broadly : a derivative of pyrrole
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