تعريف eighteen-wheeler في الإنجليزية الإنجليزية القاموس.
A tractor-trailer with eighteen wheels, normally with two steerable wheels on the first axle and four wheels on two fixed axles of the tractor and two fixed four-wheel axles on the rear of the trailer
(Otomotiv) A trucking rig consisting of a tractor and a trailer and typically having eighteen wheels