What is "viscum album"

Mistletoe \Mis"tle*toe\, n. [AS. mistelt[=a]n; mistel mistletoe + t[=a]n twig. AS. mistel is akin of D., G., Dan. & Sw. mistel, OHG. mistil, Icel. mistilteinn; and AS. t[=a]n to D. teen, OHG. zein, Icel. teinn, Goth. tains. Cf. Missel.] (Bot.) A parasitic evergreen plant of Europe ( Viscum album), bearing a glutinous fruit. When found upon the oak, where it is rare, it was an object of superstitious regard among the Druids. A bird lime is prepared from its fruit. [Written also misletoe, misseltoe, and mistleto.]
--Lindley.
--Loudon.

Note: The mistletoe of the United States is Phoradendron serotinum (syn. Phoradendron flavescens), having broader leaves than the European kind. In different regions various similar plants are called by this name. The mistletoe is used as a decoration at Christmas time, and it is a tradition that two persons of the oposite sex finding each other under a mistletoe sprig should kiss.

Viscin \Vis"cin\, n. (Chem.) A clear, viscous, tasteless substance extracted from the mucilaginous sap of the mistletoe ( Viscum album), holly, etc., and constituting an essential ingredient of birdlime.

Viscum album is a species of mistletoe in the family Santalaceae, commonly known as European mistletoe, common mistletoe or simply as mistletoe ( Old English mistle). It is native to Europe and western and southern Asia.

Viscum album is a hemiparasite on several species of trees, from which it draws water and nutrients. It has a significant role in European mythology, legends, and customs. In modern times, it is commonly featured in Christmas decoration and symbology. (V. album is found only rarely in North America, as an introduced species; its cultural roles are usually fulfilled by the similar native species Phoradendron leucarpum.)