dog-leg stair

American  

[dawg-leg, dog-] / ˈdɔgˌlɛg, ˈdɒg- /

Or dog-legged stair

noun

1. a half-turn stair, the successive flights of which are immediately side by side and connected by an intervening platform.

---

Etymology

Origin of dog-leg stair

First recorded in 1890–95