trellis.
1. Any screen-work made of thin strips (usually timber laths) crossing each other, either at 90° or set diagonally, forming a lattice of lozenge-shapes, as in an arbour or any framework supporting vines or other plants.

2. Stone enrichment of the Romanesque period resembling a wooden trellis composed of fillets, giving the appearance of continuous overlapping chevrons set between two horizontal framing mouldings. The chevron-strips are frequently decorated with stud-like elements perhaps suggesting nails.

trel·lis / ˈtrelis/ • n. a framework of light wooden or metal bars, chiefly used as a support for fruit trees or climbing plants.• v. (-lised, -lis·ing) [tr.] [usu. as adj.] (trellised) provide with or enclose in a trellis: a trellised archway. ∎  support (a climbing plant) with a trellis.

trellis grating used as a support or screen. XIV. ME. trelis — OF. trelis, -ice :- Rom. *trilīcius, -ia, f. L. trilīx, -līc-, f. TRI- + līcium thread of a warp.