WordNet (r) 3.0 (2006):

mistletoe family
    n 1: in some classifications considered a subfamily of
         Loranthaceae [syn: Viscaceae, family Viscaceae,
         mistletoe family]
    2: in some classification includes Viscaceae: parasitic or
       hemiparasitic shrublets or shrubs or small trees of tropical
       and temperate regions; attach to hosts by haustoria [syn:
       Loranthaceae, family Loranthaceae, mistletoe family]