The spiral raised surface in the bore of a weapon.
Portions of the bore left between the grooves of the rifling in the bore of a firearm- In rifling, the grooves are usually twice the width of the land. Land diameter is measured across the bore, from land to land.
Lands and Grooves make the Rifling of a barrel. The lands are the raised areas between two grooves.
The spiral raised portion of a bore remaining after the grooves have been cut or formed.
The spiraling raised portion of a rifle barrels interior remaining after the grooves have been cut or formed.