espalier

noun
  1. a framework of wood or metal used to train and support the growth of fruit trees or ornamental plants in a flat, geometric pattern against a wall or fence
  2. Usage: horticultural term
  3. a tree or plant that has been trained to grow flat against a support in a decorative pattern
  4. Usage: horticultural term
verb
  1. to train and prune a tree or plant to grow flat against a framework or wall in a geometric pattern
  2. Usage: horticultural term

Examples