castoreum
noun
cas·to·re·um ka-ˈstȯr-ē-əm 
: 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
Example Sentences
Recent Examples on the Web But they were thought to have been hunted to extinction in the 17th century for their meat, their castoreum — a secretion used in medicine and perfumes — and, above all, their fur. 
Karla Adam, Washington Post, 7 Aug. 2020 Tamworth Distillery, whose bourbon was earlier reported on by the local news outlet Concord Monitor, hasn’t been shy about including beaver castoreum in its booze. Don Reisinger, Fortune, 13 June 2018
Karla Adam, Washington Post, 7 Aug. 2020 Tamworth Distillery, whose bourbon was earlier reported on by the local news outlet Concord Monitor, hasn’t been shy about including beaver castoreum in its booze. Don Reisinger, Fortune, 13 June 2018 Word History
Etymology
Middle English castorium, from Latin castoreum, from castor
First Known Use
14th century, in the meaning defined above