trel ‧ lis /ˈtreləs, ˈtrelɪs/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: treliz 'roughly woven cloth, trellis' , from Vulgar Latin trilicius 'woven with three threads' , from Latin tri- 'three' + licium 'thread' ]
a frame made of long narrow pieces of wood that cross each other, used to support climbing plants