Source : WordNet®

XI
     n 1: the cardinal number that is the sum of ten and one [syn: {eleven},
           {11}]
     2: the 14th letter of the Greek alphabet

Source : Free On-Line Dictionary of Computing

Xi
     
        A {VLSI} design language.
     
        ["The Circuit Design Language Xi", S.I. Feldman, unpublished
        memo, Bell Labs, 1982].
     
        [Mentioned in Computational Aspects of VLSI, J.D. Ullman, CS
        Press 1984].
     
        (1995-02-03)