eosin

views updated Jun 08 2018

eosin One of a series of acidic dyes, used in optical microscopy, that colours cytoplasm pink and cellulose red. It is frequently used as a counterstain with haematoxylin for colouring tissue smears and sections of animal tissue.

eosin

views updated May 29 2018

eosin (ee-oh-sin) n. a red acidic dye, produced by the reaction of bromine and fluorescein, used to stain biological specimens for microscopical examination.