| Noun | 1. | order Santalales - order of plants distinguished by having a one-celled inferior ovary; many are parasitic or partly parasitic usually on roots plant order - the order of plants Dilleniidae, subclass Dilleniidae - a group of families of more or less advanced trees and shrubs and herbs having either polypetalous or gamopetalous corollas and often with ovules attached to the walls of the ovary; contains 69 families including Ericaceae and Cruciferae and Malvaceae; sometimes classified as a superorder family Santalaceae, sandalwood family, Santalaceae - chiefly tropical herbs or shrubs or trees bearing nuts or one-seeded fruit family Loranthaceae, Loranthaceae, mistletoe family - in some classification includes Viscaceae: parasitic or hemiparasitic shrublets or shrubs or small trees of tropical and temperate regions; attach to hosts by haustoria family Viscaceae, mistletoe family, Viscaceae - in some classifications considered a subfamily of Loranthaceae |