rotary

adjective

/ˈrəʊtəri/

[only before noun]

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(of a movement运动) moving in a circle around a central fixed point旋转的；绕轴转动的
- rotary motion旋转运动
(of a machine or piece of equipment机器或设备) having parts that move in this way转动的
- a rotary engine旋转式发动机

Word Originmid 18th cent.: from medieval Latin rotarius, from rota ‘wheel’.

noun

/ˈrəʊtəri/

(plural rotaries)

(also traffic circle)

(both North American English)

(British English roundabout)

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a place where two or more roads meet, forming a circle that all traffic must go around in the same direction（交通）环岛
Word Originmid 18th cent.: from medieval Latin rotarius, from rota ‘wheel’.