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

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v. Present participle of cube.

"We were also taken to a solid model referred to as 'cubing'."

cubed    cubes    cubing   

number    cut    multiply    suffrutex    subshrub   

four-faced cube    truncated cube    cube root    duplication of the cube    cyclical cube    leslie's cube   

cubed    cubing   

brick    die    block    square block    power    third    dice   

Rube    Tube    boob    lube    rube    tube   

slab    cylinder    rectangle    pyramid    disk    cone    dome    chunk    slice    square