pyr·role
n : 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 pyr*ro*lic adj
          
Similar sounding terms: pa·role pa·rol·ee pearl perle
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