AUTORAIL

ˈ ̷ ̷ ̷ ̷+ˌ ̷ ̷ noun

or au·to·railer “+ˌ ̷ ̷ ̷ ̷

( -s )

Etymology: auto- (II) + rail or railer

: a self-propelled vehicle equipped with both flange wheels and pneumatic tires and thus adaptable to either railway or highway operation