tubing(n = noun.artifact) tube - conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases;
is a kind of conduit
has particulars: barrel, gun barrel, blow tube, blowgun, blowpipe, blowtube, blow tube, blowpipe, blowtube, cannula, capillary, capillary tube, capillary tubing, catheter, cigarette holder, coil, chromatography column, column, drain, hose, hosepipe, inner tube, mouthpiece, pea shooter, pipage, pipe, piping, pipe, tobacco pipe, silencer, siphon, syphon, speaking tube, stem, stent, drinking straw, straw, test tube, torpedo tube, venturi, well point, wellpoint
Derived form verb tube₂

1.  The act of making tubes. [1913 Webster]

2.  A series of tubes; tubes, collectively; a length or piece of a tube; material for tubes; as, leather tubing. [1913 Webster]

tubing, n.
1 a length of tube.
2 a quantity of tubes.

capillary tubing