espalier
Concise Oxford English Dictionary © 2008 Oxford University Press:
espalier /ɪˈspaljə, ɛ-/
▶noun a fruit tree or ornamental shrub whose branches are trained to grow flat against a wall. ▶verb train (a tree or shrub) in such a way.
– origin C17: from Fr., from Ital. spalliera, from spalla ‘shoulder’, from L. spatula (see spatula), in late L. ‘shoulder blade’.
'espalier' also found in these Oxford entries:

