RACK n.
ack. (Mach.) See under Mangle. n. -- Rack block. (Naut.) See def. 1 (f), above. -- Rack lashing, a lashing or binding where the rope is tightened, and held tight by the use of a small stick of wood twisted around. -- Rack rail (Railroads), a toothed rack, laid as a rail, to afford a hold for teeth on the driving whe…