IPA: /kæˈstɔːriəm/
KK: /kæˈstɔr.i.əm/
A strong-smelling substance obtained from the glands of beavers, used in perfumes and other products.
Perfume makers sometimes use castoreum to add a unique scent to their fragrances.
Castoreum is derived from the Latin word "castor" (meaning beaver) and the suffix "-eum" (used to denote a substance). The term refers to the substance obtained from beavers, specifically the glandular secretion used in perfumery and traditional medicine.
Think of the beaver ('castor') and its special substance ('-eum') that is used in perfumes and remedies.