| − | A '''Locomotive''' is a machine used to haul a [[train]]. In the 19th century, locomotives were powered by [[Steam engine|steam]]. During the 20th century, there was a transition from steam to [[electric]] and [[diesel]] power.<ref>http://www.etymonline.com/index.php?term=locomotive</ref> | + | A '''Locomotive''' is a machine used to haul a [[train]]. In the 19th century, locomotives were powered by [[Steam engine|steam]]. During the 20th century, there was a transition from steam to [[electric]] and [[Diesel engine|diesel power]].<ref>http://www.etymonline.com/index.php?term=locomotive</ref> |