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Definition of spiral staircase noun from the Oxford Advanced Learner's Dictionary

spiral staircase

noun

/ˌspaɪrəl ˈsteəkeɪs/

/ˌspaɪrəl ˈsterkeɪs/

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a set of stairs that go upwards in a curve around a central post

See spiral staircase in the Oxford Advanced American Dictionary

Check pronunciation: spiral staircase

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