dog-leg stair

or dog-legged stair

[ dawg-leg, dog- ]
/ ˈdɔgˌlɛg, ˈdɒg- /

noun

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

Origin of dog-leg stair

First recorded in 1890–95

Words nearby dog-leg stair