[L. castoreum, f. castor beaver. Also Fr. castoréum.] = CASTOR1 2.
1398. Trevisa, Barth. De P. R., XVIII. xxix. (1495), 791. Castorium helpyth ayenst many syknesses.
1585. Lloyd, Treas. Health, C iv. Anoynte the eares, eyes and nodle with myrth, storax, Castoreum.
1626. Bacon, Sylva, § 692. The parts of Beasts putrified (as Castoreum and Musk).
1673. Phil. Trans., VIII. 6136. The art of driving away and sinking Whales by Castoreum.
1869. Roscoe, Elem. Chem., 404. The castoreum contained in a gland of the beaver.
Hence castoreum oil, resin, chemical products of castoreum.
1863–72. Watts, Dict. Chem., I. 815.
