"RDS475514" . "2006.09.05" . "DUCT" . . "u82237" . "Derived from Oxford English Dictionary (OED), Duct, 5.b." . "Definiton changed to reflect that this is intended for air. For cabel conduits, see \"electrical cable conduit\"." . "An artefact and channel through which air is conveyed for cooling, ventilation, etc." . "Qualified" . "DUCT" .