tubing
n. uncountable B2 Upper Intermediate US //ˈtubɪŋ// UK //tjˈuːbɪŋ// tub·ing
n. a system of long, hollow pipes used to carry liquids or gases. It can also mean the activity of floating down a river on a large, air-filled ring.
n. a series or system of tubes; also refers to the recreational activity of riding on an inner tube, especially on water or snow.
The mechanic replaced the old rubber tubing in the engine.
We spent the hot Saturday afternoon tubing down the river with a group of friends.
The laboratory setup required specialized glass tubing to safely transport the corrosive chemicals between the various pressurized chambers.
From tube + -ing.
Usage
Uncountable when referring to the material or the activity; individual pieces are usually called 'tubes'.