n.1. Any of various semiparasitic plants of the order Santalales that grow on the branches of other plants, especially Viscum album of Eurasia and Phoradendron leucarpum of North America, both of which have leathery evergreen leaves and waxy white berries. Extracts of the Eurasian species are sometimes used for medicinal purposes.
2. A sprig of mistletoe, often used as a Christmas decoration.