noun cas·to·re·um \ka-ˈstȯr-ē-əm\

Definition of castoreum

  1. :  a bitter strong-smelling creamy orange-brown substance that consists of the dried perineal glands of the beaver and their secretion and is used especially by perfumers —called also castor

Origin and Etymology of castoreum

Middle English castorium, from Latin castoreum, from castor

First Known Use: 14th century

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