ˌrezōˈrüfə̇n noun
( -s )
Etymology: International Scientific Vocabulary reso rcin + Latin ruf us red + International Scientific Vocabulary -in — more at red
: a red-brown crystalline dye C 12 H 7 NO 3 of the phenoxazine class that gives fluorescent red or pink solutions, that is formed by the action of nitrosylsulfuric acid on resorcinol or by reduction of resazurin, and that on reduction yields a colorless dihydro derivative