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

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n. Plural form of tube.

n. The Internet.

v. Third-person singular simple present indicative form of tube.

"In my local northern lakes, they seem to like green-pumpkin tubes best, with sparkle-flake white a close second."

tube sheet   

tubed    tubes    tubing   

furnish    provide    supply    render    ride    convey    take    bring    cylinder    railway line   

palladium tube    twopenny tube    dentinal    mercury-tube    coil    impregnating-tube    simple tube    pine-leaf tube-builder    torricellian tube    bowman's corneal tubes   

priming    friction    tubeworm   

tubed    tubing    picture tube    intubate    inner tube    buckytube    nanotube    Fallopian tube    cathode ray tube   

pipe    telescope    subway    keeve    kive    cowl    Bowie    kit    corf    beck   

Rube    boob    cube    lube    rube   

cylinder    pipe    wire    tank    container    box    plate    rod    panel    valve