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espalier(ĕspăl`yər), trellis or lattice used in horticulture for training a tree or vine flat against a wall, either for ornament or to fit it into a small space, allowing it to get a maximum of air and sun and bringing the fruit within easy reach for gathering. The plant, often an apple or pear tree, may be trained into various shapes, such as a fan or a fork. The term is more commonly used for the tree or vine so trained.
a method of crop cultivation by which the above-ground portion of the plant is attached to some type of support, or espalier (poles, stakes, trellises made from rods, walls, or frames with several rows of wire or cord stretched across them). This method of cultivation is used for grapevines, fruit trees, berry shrubs, vegetable crops, and ornamental plants.