Yep. Here are two sources that support my assertion (see the last paragraph of the second image).Nope. Cylinder vacs are long and narrow like these Eurekas, most Electrolux and Royal cylinder vacs. Something like Rotomatic, GE Swiveltop, Numatic Henry, Charles or James, Filter Queen, Lux Powerprof or most Nilfisk models would be called tank vacuums. Tanks are lower, larger diameter and open on top. And in the US we lump them all together as canister vacs.