erythrosine

noun
eryth·​ro·​sine | \i-ˈrith-rə-sən, -ˌsēn \
variants: also erythrosin \ -​sən \

Medical Definition of erythrosine 

: a brick-red powdered xanthene dye C20H6I4Na2O5 that is used as a biological stain and in dentistry as an agent to disclose plaque on teeth

called also erythrosine sodium

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