Chem. [f. CASTOR1 + -IN.] A crystalline substance obtained from castoreum.
1831. J. Davies, Manual Mat. Med., 292. Castorine is, according to M. Bizio, the active principle of castor.
1861. Hulme, trans. Moquin-Tandon, II. III. ii. 121.
1872. Watts, Dict. Chem., I. 815. The mother liquor deposits crystals of castorin.
