Definitions for traceryˈtreɪ sə ri
Random House Webster's College Dictionary
trac•er•yˈtreɪ sə ri(n.)(pl.)-er•ies.
ornamental work consisting of ramified ribs, bars, or the like, as in the upper part of a Gothic window, in panels, screens, etc.
any delicate, interlacing work of lines, threads, etc., as in carving or embroidery; network.
Origin of tracery:
decoration consisting of an open pattern of interlacing ribs
bars or ribs, usually of stone or wood, or other material, that subdivide an opening or stand in relief against a door or wall as an ornamental feature.