A tower with stairs on the inside.

plural of stairclimber

Without stairs.

plural of stairchair

(emergency medicine) A foldout gurney used to transport a medical patient up and down stairs.

In a high building, a stairway protected by several inches of concrete and entered through a kind of "air lock" that prevents smoke from entering in the event of a fire.

Any of the steps in a staircase

Taking a shape or form similar to or suggestive of the steps in a staircase

plural of stairstep

Having distinct evenly-spaced values, especially when arranged in order.