three-quarter turn stair
a staircase requiring a three-quarter turn at each landing for continued ascent or descent.
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- three-quarter armor,
- three-quarter binding,
- three-quarter nelson,
- three-quarter time,
- three-ring circus,
Origin of three-quarter turn stair
First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019