An open space allowing passage
From far away, the opening of the cave looked like a mere aperture in the rock wall.
At the front is a large slab, sometimes carved, with a small aperture in it, through which offerings might be inserted.
Compatible only with Mac OS X and being somewhat reminiscent of the operating system's iPhoto application, Aperture 3 is an excellent tool for organizing photos into libraries and projects.
The small aperture in the wall let in enough of the outside light to create shadows all around the room.
After taking the camera back to the store, they determined that the damage was in the aperture.