During movement, friction causes the hairs to form tiny tunnels called sinuses.

Cutting through Ulvian's golden dreams, a rough voice from farther back in the tunnel called faintly, "Waterboy!

A heavily guarded convoy of trucks then drove them an incredible distance down to an ancient tunnel, once called Saint Gottard, about nine miles long.

Rubio has beautiful natural tunnels called La Cueva de los Miagros.

Thus tiny tunnels called brine channels are created all through the ice as this supersaline, supercooled water sinks away from the frozen pure water.

After the escape, the prisoners started digging another tunnel called George, but this was abandoned when the camp was evacuated.

These abnormal tunnels, called fistulas, are a common complication of Crohn's disease and may become infected.

Horizontal tunnels called drifts were dug out from the shaft at different levels to find the gold-bearing rock.

The marten is largely arboreal, while the badger digs extensive networks of tunnels, called setts.

"No no," Nadia whispered back, happy as she looked over the big central park in the third-from-the-south segment of the tunnel, called Lato.