dieseldom

noun

1. (literary, uncommon, uncountable)the state of being dieselised, or having achieved dieselisation with the introduction of diesel locomotives.

   “The Texas J1's were eminently satisfactory, but the railroad's disinclination to buy anybody else's ideas was expressed in a rash of duplex-drive 4-4-4-4 and 4-4-6-4 engines after the war. Their theory was admirable but their performance hastened the day of dieseldom.”

   “The Alco C-628s had arrived, and the Hoosier Line entered the big leagues of dieseldom.”