Chem. [a. F. viscin (Macaire), f. L. viscum birdlime (see VISCOUS a.) + -IN.] A substance that forms the main constituent of birdlime, chiefly obtained from the berries and other parts of the mistletoe.
1838. T. Thomson, Chem. Org. Bodies, 917. The berries yield to alcohol a brown extractive matter soluble in water, which smells like viscin.
1887. Bucks Handbk. Med. Sci., V. 12/1. Mistletoe contains sugar, and a peculiar, very sticky substance, viscin. Viscin is also contained in a few other plants.