cas·to·re·um /kæˈstoriəm, ˈstɔr-/
海狸香
Cas·to·re·um 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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