millrace

from WordNet (r) 3.0 (2006)

millrace
    n 1: a channel for the water current that turns a millwheel
         [syn: {millrace}, {millrun}]

from The Collaborative International Dictionary of English v.0.48

millrace \millrace\ n.
   a channel from a millpond to a millwheel, to provide the
   water current that turns the millwheel.

   Syn: millrun.
        [WordNet 1.5] Millree
        Millrea