noun

• A yellowish crystalline compound, whose molecule contains two benzene rings joined by a methylene group and an oxygen atom, and whose derivatives include brilliant, often fluorescent, dyes such as fluorescein and rhodamines.

  Chemical formula: C??H??O

  More example sentences

  • ‘Some other dye systems are based on the chromophores triphenylmethane, xanthene, anthroquinone, indigo, and phthalocyanine.’