"tubing" in the noun sense
1. tube, tubing
conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
"tubing" in the verb sense
1. tube
provide with a tube or insert a tube into
2. tube
convey in a tube
"inside Paris, they used to tube mail"
3. tube
ride or float on an inflated tube
"We tubed down the river on a hot summer day"
4. tube
place or enclose in a tube
Source: WordNet® (An amazing lexical database of English)
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