toluidine blue

noun

Definition of toluidine blue 

: a basic thiazine dye that is related to methylene blue and is used as a biological stain

First Known Use of toluidine blue

1898, in the meaning defined above

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The first known use of toluidine blue was in 1898

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toluidine blue

noun

Medical Definition of toluidine blue 

: a basic thiazine dye that is related to methylene blue and is used as a biological stain and especially formerly as an antihemorrhagic drug

called also tolonium chloride

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