1846 T. Craddock 91 The loss..as that shown by the expansive curve, induced me to devise the arrangement I have designated the Twin-Cylinder Engine.
a1884 E. H. Knight Suppl. 910/1 Twin Cylinder Steam Engine.
1907 24 May 9/3 The International Motor Cycle Tourist Trophy Race... Twenty-two single-cylinder and seven twin-cylinder machines have been entered.