capstone
copestone
coping stone
stretcher

He supposes that some frogs are sitting on the coping stones of a circular lily pond.

He slipped his pistol into his pocket and pulled the small man easily onto the coping stone of the abutment.

The roof was lipped with a low wall, set on top with eroded coping stones.

The tremors caused heavy coping stones to shift and cracks appeared in the faces of the dam.

Ten years ago, vandals had flung its coping stones into a pond; graffiti-smeared walls were tumbling.

The coping stones on top of the wall should be bedded in a stronger mix.

Kaa had only just worked his way over the west wall, landing with a wrench that dislodged a coping stone into the ditch.

The King laid the last coping stone with a silver trowel and declared the bridge open.

They were using a loose coping stone on the , embankment near the Festival Hall.

For the nuclear element in electricity privatisation is the coping stone on which the flotation plans are based.