ˈtəbiŋ, -bēŋ noun
( -s )
Etymology: tub (I) + -ing
1. : the making of tubs ; also : materials for making tubs : tub stock
2. : a lining of timber or metal for a shaft (as in a mine) ; especially : a watertight shaft lining consisting of a series of cast-iron cylinders bolted together and used to sink through water-bearing strata