geometrical staircase
noun
A staircase, especially one that is spiral or curved, in which each step is supported at the wall end only.
Origin
Mid 18th century; earliest use found in Jonas Hanway (bap. 1712, d. 1786), merchant and philanthropist.
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| 单词 | geometrical staircase |
| 释义 | geometrical staircasenoun A staircase, especially one that is spiral or curved, in which each step is supported at the wall end only. Origin |
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