erythrosin

noun
eryth·ro·sin | \ i-ˈrith-rə-sən \
variants: or less commonly erythrosine \i-ˈrith-rə-sən, -ˌsēn \

Definition of erythrosin 

: any of several dyes made from fluorescein that yield reddish shades

First Known Use of erythrosin

circa 1882, in the meaning defined above

History and Etymology for erythrosin

International Scientific Vocabulary erythr- + eosin

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The first known use of erythrosin was circa 1882

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Britannica.com: Encyclopedia article about erythrosin

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occurring twice a year or every two years

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