rotary

 
Pronunciation: /ˈrəʊt(ə)ri/

adjective

  • (of motion) revolving around a centre or axis; rotational.
  • (of a thing) acting by means of rotation, especially (of a machine) operating through the rotation of some part: a rotary mower

noun (plural rotaries)

  • 1a rotary machine, engine, or device: there is an output level rotary for overall volume setting
  • 2North American a traffic roundabout.

Origin:

mid 18th century: from medieval Latin rotarius, from rota 'wheel'