(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.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). castoreum. Retrieved September 22, 2026, from http://smartdefine.org/castoreum/definitions/1985174 |
| Chicago | Webster's. 2011. "castoreum" http://smartdefine.org/castoreum/definitions/1985174 (accessed September 22, 2026). |
| Harvard | Webster's 2011, castoreum, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/castoreum/definitions/1985174>. |
| MLA | Webster's. "castoreum" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/castoreum/definitions/1985174> |