orcein

noun
or·​ce·​in | \ ˈȯr-sē-ən How to pronounce orcein (audio) \

Medical Definition of orcein

: a purple nitrogenous dye that is the essential coloring matter of cudbear and archil and that is used as a biological stain

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Cite this Entry

“Orcein.” The Merriam-Webster.com Medical Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/medical/orcein. Accessed 8 December 2019.

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