limber

1. (military) A two-wheeled vehicle to which a wheeled artillery piece or caisson may be attached for transport.Examples: "An' when the smoke 'ad cleared away, before the limber wheels, / There lay the Driver's Brother with 'is 'ead between 'is 'eels."; "As the limber gunners went to the rear, his horse trod in a rabbit-hole and came down, throwing him into a depression of the ground."; "we covered the rutted, rattling, dusty pot-holed roads of coastal Victoria, six big Walers in front, the cannon at the rear, and that unsprung cart they called a ‘limber’ in the middle."

2. (in the plural) The shafts or thills of a wagon or carriage.in-plural

3. (nautical, in the plural) Gutters or conduits on each side of the keelson to allow water to pass to the pump well.in-plural