eosin

• POS: Noun
• HYPHEN: e=o=sin

CIDE DICTIONARY

eosin, n. [Gr. dawn.].

 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.  [1913 Webster]

OXFORD DICTIONARY

eosin, n. a red fluorescent dyestuff used esp. as a stain in optical microscopy.

Etymology

Gk eos dawn + -IN