plural of spiral staircase

An impossible loop of endlessly ascending and descending stairs, or an optical illusion appearing to be one.

plural of Penrose staircase

(mathematics, informal) Synonym of Cantor function; a type of monotonic increasing function.

A waterfall in Wassen Creek, Devil’s Staircase Wilderness, Siuslaw National Forest, Oregon, United States; a multi-tiered low cascading waterfall.

An escalator.

plural of moving staircase

plural of everlasting staircase

(UK, obsolete, idiomatic, slang, historical) A prison treadmill.

Resembling or characteristic of a staircase.