Source : Webster's Revised Unabridged Dictionary (1913)

Trellis \Trel"lis\, n. [OE. relis, F. treillis, fr. treille vine
   arbor, fr. L. tricla, triclea, triclia, a bower, arbor,
   summer house.]
   A structure or frame of crossbarred work, or latticework,
   used for various purposes, as for screens or for supporting
   plants.

Source : WordNet®

trellis
     n : latticework used to support climbing plants [syn: {treillage}]
     v : train on a trellis, as of a vine

Source : Free On-Line Dictionary of Computing

Trellis
     
        1. An {object-oriented} language from the University of
        Karlsruhe(?) with {static type-checking} and {encapsulation}.
     
        2. An {object-oriented} application development system from
        {DEC}, based on the {Trellis} language.  (Formerly named Owl).
     
        E-mail: Jerry Smith 
     
        ["Persistent and Shared Objects in trellis/owl", P. O'Brien et
        al, Proc 1986 IEEE Workshop on Object-Oriented Database
        Systems, IEEE, NY 1986].