eosin

eo·sin

noun \ˈē-ə-sən\

Definition of EOSIN

1

: a red fluorescent dye C₂₀H₈Br₄O₅ obtained by the action of bromine on fluorescein and used especially in cosmetics and as a toner; also : its red to brown sodium or potassium salt used especially as a biological stain for cytoplasmic structures

2

: any of several dyes related to eosin

Variants of EOSIN

eo·sin also eo·sine \-sən, -ˌsēn\

Origin of EOSIN

International Scientific Vocabulary, from Greek ēōs dawn

First Known Use: 1866