trompe l'œil
Concise Oxford English Dictionary © 2008 Oxford University Press:
trompe l'œil /ˌtrɒmp ˈlɔɪ/
▶noun (pl. trompe l'œils pronunc. same) visual illusion in art, especially as used to trick the eye into perceiving a painted detail as a three-dimensional object.
■ a painting or design intended to create such an illusion.
– origin Fr., lit. ‘deceives the eye’.
'trompe l'œil' also found in these Oxford entries:

