Bas-relief
/ˈbæs.ɹɪˌliːf/
noun
A low or mostly-flat sculpture which is carved into a wall, or is in the form of a tile mounted flat to a wall, rather than a fully three-dimensional, free-standing figure.
Synonyms: basso-relievo, basso-rilievo, cameo, low relief
adjective
Refers to any aspect of sculpture which is flat or in the bas relief style.