"roundabouts" in the noun sense
1. traffic circle, circle, rotary, roundabout
a road junction at which traffic streams circularly around a central island
"the accident blocked all traffic at the rotary"
2. carousel, carrousel, merry-go-round, roundabout, whirligig
a large, rotating machine with seats for children to ride or amusement
Source: WordNet® (An amazing lexical database of English)
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