ro·ta·ry 
(rōtə-rē)
(rōtə-rē)adj.
Of, relating to, causing, or characterized by rotation, especially around an axis.
n. pl. ro·ta·ries
1. A part or device that rotates around an axis.
2. Chiefly New England See traffic circle.
[Medieval Latin rotārius, from Latin rota, wheel; see ret- in the Appendix of Indo-European roots.]