ETYM Latin rota a wheel. Related to Roll, barouche, Rodomontade, Roué, Round, Rowel.
Relating to or characterized by rotation.
Il se dit d'un mouvement de rotation, et du point autour duquel ce mouvement s'exécute.
1. A rotary machine
2. A road junction formed around a central circle about which traffic moves in one direction only — called also circle, traffic circle