fretwork(n = noun.artifact) lattice, latticework - framework consisting of an ornamental design made of strips of wood or metal;
is a kind of framework
has parts: lath
has particulars: treillage, trellis

   Work adorned with frets; ornamental openwork or work in relief, esp. when elaborate and minute in its parts. Hence, any minute play of light and shade, dark and light, or the like. [1913 Webster]
"Banqueting on the turf in the fretwork of shade and sunshine." [1913 Webster]

fretwork, n. ornamental work in wood, done with a fretsaw.

N  crossing, intersection, interdigitation, decussation, transversion, convolution, level crossing, reticulation, network, inosculation, anastomosis, intertexture, mortise, net, plexus, web, mesh, twill, skein, sleeve, felt, lace, wicker, mat, matting, plait, trellis, wattle, lattice, grating, grille, gridiron, tracery, fretwork, filigree, reticle, tissue, netting, mokes, rivulation, cross, chain, wreath, braid, cat's cradle, knot, entangle, cloth, linen, muslin, cambric, crossing, crossed, matted, v, transverse, cross, cruciform, crucial, retiform, reticular, reticulated, areolar, cancellated, grated, barred, streaked, textile, crossbarred, cruciate, palmiped, secant, web-footed, cross, thwart, athwart, transversely, at grade, crosswise.