1. Plural of eosin; a red or orange-red synthetic dye used in inks, cosmetics, and as a biological stain.
Usage: chemistry; technical

Examples

• The laboratory used eosines to stain tissue samples for microscopic examination.
• Eosines are commonly found in red food colorings and cosmetic products.
• The chemist ordered several batches of eosines for the dyeing experiment.
• Eosines produce a bright red hue when dissolved in water.
• The textile manufacturer selected eosines for their vibrant color and stability.