ceiling ornament

ceiling medallion, ceiling ornament, ceiling rose

A ceiling ornament, usually cast in plaster; often a luminaire or chandelier is hung from its center; see medallion, 2.
References in periodicals archive ?
"Removing the battery turns the smoke alarm into an ugly ceiling ornament serving no purpose.
The most striking feature of the upper floor is the elliptic vault of the ceiling ornamented with mural medallions and images of the owner's impressions of Egypt and Istanbul.