purpurin
noun
pur·pu·rin
| \ ˈpər-pyə-rən
\
\
Medical Definition of purpurin
1
: an orange or red crystalline compound C14H8O5 obtained from madder root along with alizarin or by oxidation of alizarin and used in dyeing
2
also purpurine \ -rən, -ˌrēn
\
: any of various colored compounds obtained from chlorophyll or related compounds by the action of cold alcoholic alkali and oxygen
\
: any of various colored compounds obtained from chlorophyll or related compounds by the action of cold alcoholic alkali and oxygen