eosin Meaning, Definition & Usage

  1. noun a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures
    bromeosin.

WordNet

E"o*sin noun
Etymology
Gr. dawn.
Definitions
  1. (Chem.) A yellow or brownish red dyestuff obtained by the action of bromine on fluoresceïn, and named from the fine rose-red which it imparts to silk. It is also used for making a fine red ink. Its solution is fluorescent.

Webster 1913