dolly
n. countable C1 Advanced US //ˈdɑɫi// UK //dˈɒli// dol·ly
n. a small wheeled platform used to move heavy objects or film cameras.
n. a low platform with wheels, used for transporting heavy loads or supporting camera equipment during filming.
They used a dolly to move the piano upstairs.
The crew pushed the camera dolly along the track to follow the actor.
The smooth tracking shot was achieved using a motorized dolly that glided silently across the polished floor.