(ˈ)käz|mäd.ē-, (ˈ)kōz|- noun
Usage: usually capitalized C
Etymology: after Cosmati, a group of Italian artists active in Rome and vicinity from ab 1150-1320, plural of the name Cosmas; from the fact that many members of the group had the given name Cosmos (Cosimo)
: a style of fine mosaic inlay in geometric patterns made of colored marbles, glass paste, and gold leaf developed during the 12th and 13th centuries