This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Tubes considered as a group.

n. A system of tubes.

n. A piece or length of tube.

n. Tubular fabric, such as that used for making pillowcases.

n. The sport or recreation of floating down a stream or river in an inner tube.

n. tubes, considered as a group

n. a length of tube, or a system of tubes

n. the recreation of riding down a river on an inner tube

v. Present participle of tube.

n. The act of making tubes.

n. A series of tubes; tubes, collectively; a length or piece of a tube; material for tubes.

n. Specifically, a thin steel pipe or tube used to line the bore of a deep well for water, gas, or air to prevent the bore from getting out of line or caving in, and to keep water and other foreign matter from getting into the well from the sides of the hole. It is thinner in gage than boiler-tube or pipe.

n. The act of making tubes, or providing with tubes.

n. A tube or tubes collectively: as, ten feet of tubing.

n. conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases

"They are made of some kind of plastic tubing and after the tubing is attached to the existing concrete floor, a special layer of concrete is put on top of the tubing."

conduit   

rubber tubing   

wellpoint    siphon    inner tube    straw    tobacco pipe    syphon    pipage    test tube    torpedo tube    blowpipe   

tube   

hose    fitting    tube    conduit    mesh    rod    nozzle    pipe    container    girder