or·​ce·​in ˈȯr-sē-ən How to pronounce orcein (audio)
: 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.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/orcein. Accessed 1 Dec. 2023.

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