0-4-0 Definition
noun
Under the Whyte notation system, the simplest form of steam locomotive, with two axles and four driving wheels, and no leading wheels or trailing wheels.
Wiktionary
Under the Whyte notation, a steam locomotive that has four coupled driving wheels followed by two trailing wheels, with no leading wheels.
Wiktionary
Under the Whyte notation, a steam locomotive that has four coupled driving wheels followed by four trailing wheels, with no leading wheels.
Wiktionary
Other Word Forms of 0-4-0
Noun
Singular:
0-4-0
Plural:
0-4-0s, 0-4-2s, 0-4-4s