thorn apple(n = noun.plant) - any of several plants of the genus Datura;
is a kind of bush, shrub
is a member of datura, genus datura
has particulars: apple of peru, common thorn apple, datura stramonium, jamestown weed, jimson weed, jimsonweed

adam's apple, american crab apple, apple, apple aphid, apple blight, apple butter, apple canker, apple dumpling, apple fritter, apple geranium, apple jelly, apple juice, apple maggot, apple mint, apple nut, apple of discord, apple of peru, apple orchard, apple pie, apple polisher, apple polishing, apple rust, apple sauce, apple tart, apple tree, apple turnover, balsam apple, bell apple, big apple, blade apple, candied apple, candy apple, caramel apple, cherry apple, christ thorn, cockspur thorn, common thorn apple, cooking apple, crab apple, cultivated crab apple, custard apple, custard apple tree, dessert apple, eating apple, evergreen thorn, fire thorn, glastonbury thorn, green apple aphid, hedge thorn, iowa crab apple, jamaica apple, jerusalem thorn, kai apple, kangaroo apple, kei apple, kei apple bush, love apple, mad apple, mammee apple, may apple, mysore thorn, oak apple, orchard apple tree, oregon crab apple, otaheite apple, parsley-leaved thorn, pitch apple, pond apple, prickly custard apple, rose apple, sea apple, siberian crab apple, sorb apple, sorb apple tree, southern crab apple, star apple, sugar apple, taffy apple, thorn, toffee apple, western crab apple, wild apple, woolly apple aphid