Aircraft Refueler [1]

A tank vehicle used at airports to transport fuel to an airplane for refueling. The main feature of the vehicle is a large tank from which fuel is pumped directly into the aircraft through an aircraft fueling nozzle [2].

Some larger airports use hydrant refuelers to supply fuel to aircraft. These hydrant vehicles do not, themselves, transport fuel. Rather, they provide a refueling connection between the aircraft and an underground fuel supply. 

See also Hydrant refueler [3].