The mine consists of a more or less oval, primary blotch with frass in concentric arcs.

The girl looked uncertain as she eyed the concentric arcs of the nautilus spiral.

There will be iso-transport energy lines forming concentric arcs about the discharge point at the apex of the fan.

Around this point a blotch mine develops with much frass in concentric arcs.

The dog was now on the lawn, moving in concentric arcs that became shorter and shorter.

Partway around, a flat space faced rising concentric arcs, something like the steps in the feeding dome.

The Madingley cemetery holds 3,812 graves, arranged in concentric arcs.

Cliff and red-hot wall were concentric arcs of circles.

My view of Hell was darkness and firelit smokes, the fires tracing concentric arcs.

Tornadoes spawned by Ivan struck communities along concentric arcs on the leading edge of the storm.