[cas.to.re.um] n [ME castorium, fr. L castoreum, fr. castor] (14c): a bitter strong-smelling creamy orange-brown substance that consists of the dried perineal glands of the beaver and their secretion and is used esp. by perfumers--called also castor
CASTOREUM
Meaning of CASTOREUM in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012