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trel·lis (trĕĺĭs)

[Middle English trelis, from Old French, from Vulgar Latin* trilīcius, from Latin trilīx, trilīc-, woven with three threads, tri-, tri-, + līcium, thread.]

noun 

  1. A structure of open latticework, especially one used as a support for vines and other creeping plants.
  2. An arbor or arch made of latticework.

transitive verb: -lised, -lis·ing, -lis·es. 

  1. To provide with a trellis, especially to train (a vine) on a trellis.
  2. To make (something) in the form of a trellis.