plural of 0-60-0

(chiefly US military slang) Half an hour past 12(am) midnight, or more formal and exact would be 00:30; The practice of adding “dark” and “thirty” (30) can be used sometimes as a slang term in place of an otherwise specific time a time of night, meaning some time when it is dark out between 00:01 - 05:00 hours local time.

(chiefly US military slang) An otherwise unspecified time of night; some time when it is dark out.

Under the Whyte notation, a steam locomotive that has eight coupled driving wheels followed by four trailing wheels, with no leading wheels.

Under the Whyte notation system, a steam locomotive that has eight coupled driving wheels followed by two trailing wheels, with no leading wheels.

Under the Whyte notation system, a steam locomotive that has four leading wheels on a leading truck followed by four sets of coupled driving wheels, and no trailing wheels.

plural of 0-4-4

plural of 0-10-0

plural of 0-4-2

Under the Whyte notation system, a steam locomotive that has a single-axle leading truck followed by six powered driving axles, and no trailing wheels.