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English definition of “spiral”

spiral

noun [C]    /ˈspɑɪ·rəl/
a shape of a continuous, curving line that forms circles around a center point: A corkscrew is made in a spiral. fig. Roy was bitter about the downward spiral of his life (= it was becoming continuously worse). spiral    /ˈspɑɪ·rəl/ adjective [not gradable] New playground equipment includes a large spiral slide.
(Definition of spiral noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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