<p><strong>Noun</strong></p><ul><li>Material in the form of a tube: glass tubing.</li><li>Tubes collectively.</li><li>A piece of tube: two feet of copper tubing.</li><li>Also called inner-tubing.</li><li>The sport or recreation of floating down a river or stream on an inner tube.</li></ul><p><strong>End of Response</strong></p>