Dictionary

methylene blue

methylene blue

noun

Definition of METHYLENE BLUE

:  a basic thiazine dye C16H18ClN3S·3H2O used especially as a biological stain, an antidote in cyanide poisoning, and an oxidation-reduction indicator

First Known Use of METHYLENE BLUE

circa 1890

methylene blue

noun    (Medical Dictionary)

Medical Definition of METHYLENE BLUE

:  a basic thiazine dye C16H18ClN3S·3H2O used in the treatment of methemoglobinemia, as an antidote in cyanide poisoning, as a biological stain, and as an oxidation-reduction indicator

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