Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of castoreum is as below...

Castor :: Castor (n.) Castoreum. See Castoreum.

Castorin :: Castorin (n.) A white crystalline substance obtained from castoreum.

Castoreum :: Castoreum (n.) A peculiar bitter orange-brown substance, with strong, penetrating odor, found in two sacs between the anus and external genitals of the beaver; castor; -- used in medicine as an antispasmodic, and by perfumers..

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