Webster's English Dictionary

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rotary

Cross references:
  1. circle                 2. traffic circle        
 
1. ro.ta.ry \'ro-t-*-re-\ aj [ML rotarius, fr. L rota wheel] 1a: turning on 
   an axis like a wheel  1b: taking place about an axis {~ motion}  2: having 
   an important part that turns on an axis {~ cutter}  3: characterized by 
   rotation  4: of, relating to, or being a press in which paper is printed by 
   rotation  in contact with a curved printing surface attached to a cylinder
2. rotary n 1: a rotary machine  2: a road junction formed around a central 
   circle about which traffic moves  in one direction only