The Collaborative International Dictionary of English v.0.48:

Conduit \Con"duit\ (? or ?; 277), n. [F., fr. LL. conductus
   escort, conduit. See Conduct.]
   1. A pipe, canal, channel, or passage for conveying water or
      fluid.
      [1913 Webster]

            All the conduits of my blood froze up. --Shak.
      [1913 Webster]

            This is the fountain of all those bitter waters, of
            which, through a hundred different conduits, we have
            drunk.                                --Burke.
      [1913 Webster]

   2. (Arch.)
      (a) A structure forming a reservoir for water. --Oxf.
          Gloss.
      (b) A narrow passage for private communication.
          [1913 Webster] Conduit system

WordNet (r) 3.0 (2006):

conduit
    n 1: a passage (a pipe or tunnel) through which water or
         electric wires can pass; "the computers were connected
         through a system of conduits"