Definitions for viscum
Viscum, genus Viscum(noun)
type genus of the Viscaceae: Old World evergreen shrubs parasitic on many trees including oaks but especially apple trees, poplars, aspens and cottonwoods
a genus of parasitic shrubs, including the mistletoe of Europe
birdlime, which is often made from the berries of the European mistletoe
U.S. National Library of Medicine
A plant genus in the family VISCACEAE, order Santalales, subclass Rosidae, class Magnoliopsida. Species of this genus contain cytotoxic LECTINS. The common name of MISTLETOE is used for many species of this and the LORANTHACEAE families.