
Castoreum m is the exudate from the castor sacs of the mature North American Beaver (Castor canadensis) and the European Beaver (Castor fiber). Within the zoological realm, castoreum is the yellowish secretion of the castor sac which is, in combination with the beaver`s urine, used during scent marking of territory. Both beaver genders possess a ....
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http://en.wikipedia.org/wiki/Castoreum
[fungus] Castoreum is a genus of truffle-like fungi in the Mesophelliaceae family. The genus, circumscribed by English mycologists Mordecai Cubitt Cooke and George Edward Massee in 1887, contains three species found in Australia. ...
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http://en.wikipedia.org/wiki/Castoreum_(fungus)

• (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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http://thinkexist.com/dictionary/meaning/castoreum/
Cas·to're·um noun [ Latin See
Castor .] 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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http://www.encyclo.co.uk/webster/C/33

archaic or obsolete terms > General: A peculiar bitter orange-brown substance, with strong, penetrating odour, 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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http://www.skyscript.co.uk/glossarytt.html
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