M’-Naught
M’-Naught´ (m ak•nat"), v. t. (Steam Engines) To increase the power of (a single- cylinder beam engine) by adding a small high-pressure cylinder with a piston acting on the beam between the center and the flywheel end, using high-pressure steam and working as a compound engine, — a plan introduced by M’Naught, a Scottish engineer, in 1845.