toluidine blue

noun

Definition of toluidine blue

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

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toluidine red toner

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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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