unit train
noun
a freight train of uniform consist that remains coupled, carrying a bulk commodity, as coal or wheat, to a specific destination and that after unloading returns to the point of origin ready for another load.
Origin of unit train
First recorded in 1960–65
Words nearby unit train
unit pricing,
unit process,
unit record,
unit rule,
unit stress,
unit train,
unit trust,
unit vector,
unit's place,
unit-linked policy,
unit.