Source : Webster's Revised Unabridged Dictionary (1913)

Plexus \Plex"us\, n.
   A network; an intricate or interwoven combination of elements
   or parts in a coherent structure.

         In the perception of a tree the reference to an object
         is circumscribed and directed by a plexus of visual and
         other presentations.                     --G. F. Stout.

Plexus \Plex"us\, n.; pl. L. {Plexus}, E. {Plexuses}. [L., a
   twining, braid, fr. plectere, plexum, to twine, braid.]
   1. (Anat.) A network of vessels, nerves, or fibers.

   2. (Math.) The system of equations required for the complete
      expression of the relations which exist between a set of
      quantities. --Brande & C.

Plexus \Plex"us\, n.; pl. L. {Plexus}, E. {Plexuses}. [L., a
   twining, braid, fr. plectere, plexum, to twine, braid.]
   1. (Anat.) A network of vessels, nerves, or fibers.

   2. (Math.) The system of equations required for the complete
      expression of the relations which exist between a set of
      quantities. --Brande & C.

Source : WordNet®

plexus
     n : a network of intersecting blood vessels or intersecting
         nerves or intersecting lymph vessels [syn: {rete}]

Source : Free On-Line Dictionary of Computing

Plexus
     
        A modular {World-Wide Web} {server} written in {Perl} by Tony
        Sanders .  Comes with interfaces to allow
        many other information services to be served via the Web.
     
        {Version 3.0m 1994-07-22 (ftp://ftp.earth.com/plexus/)}.
     
        (1994-07-22)