10. (Marine Engin.) The difference between the speed of a screw steamer under sail and that of the screw when the ship outruns the screw; or between the propulsive effects of the different floats of a paddle wheel. See Citation under Drag, v. i., 3.
Drag sail (Naut.), a sail or canvas rigged on a stout frame, to be dragged by a vessel through the water in order to keep her head to the wind or to prevent drifting; -- called also drift sail, drag sheet, drag anchor, sea anchor, floating anchor, etc. -- Drag twist (Mining), a spiral hook at the end of a rod for cleaning drilled holes.
Dra*gan"tine (?), n. [See Dracanth.] A mucilage obtained from, or containing, gum tragacanth.
Drag"bar` (?), n. Same as Drawbar (b). Called also draglink, and drawlink. [U. S.]