4-2-2Noun. Under the Whyte notation system, a steam locomotive that has four leading wheels arranged in a leading truck, two driving wheels and two trailing wheels.
This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.