D defs.my
Entry 2 senses Webster, 1913

Tubbing

· Tub·bing · IPA
01 n. The forming of a tub; also, collectively, materials for tubs.
  1. 1.
    The forming of a tub; also, collectively, materials for tubs.
  2. 2.
    A lining of timber or metal around the shaft of a mine; especially, a series of cast-iron cylinders bolted together, used to enable those who sink a shaft to penetrate quicksand, water, etc., with safety.