4-6-4-4 Definition
noun
Under the Whyte notation system, a duplex steam locomotive that has four leading wheels in a leading truck followed by six coupled driving wheels, a second set with four coupled driving wheels, and four trailing wheels in a trailing truck.
Wiktionary
Other Word Forms of 4-6-4-4
Noun
Singular:
4-6-4-4
Plural:
4-6-4-4s
