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The Collaborative International Dictionary
Murexoin

Murexoin \Mu*rex"o*["i]n\, n. (Chem.) A complex nitrogenous compound obtained as a scarlet crystalline substance, and regarded as related to murexide.

Wiktionary
murexoin

n. (context chemistry English) A complex nitrogenous compound obtained as a scarlet crystalline substance, and regarded as related to murexide.