The wing consists of two main elements, separated by a vertical slot through which air can flow.

The door is solid steel with a vertical slot that allows for a guard to peer in.

The bottom of the pillar was suddenly perforated with vertical slots.

I moved out of the slings onto smears and reached a one finger vertical slot.

A container with vertical slots on the side was tested.

A trio of vertical slots recurs but not often enough to be a dominant motif.

Under every cover is a subterranean vertical slot, nearly 20 feet deep.

The basement door was ajar, a vertical black slot against the gloom of the hallway.

Behind the register were vertical slots against the walls, crammed with cigarette packets.

The library doors stood shut, a vertical slot of mouth in that brooding granite face.