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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Erythrosin  \E*ryth"ro*sin\,  n.  [Gr.  'eryqro`s  red.]  (Chem.) 
  a  A  red  substance  formed  by  the  oxidation  of  tyrosin. 
  b  A  red  dyestuff  obtained  from  fluoresce["i]n  by  the  action 
  of  iodine.