The glow showed a tortuous channel, with short side passages where waves licked the underground rock.

When night came, they were fortunate that the sky was clear; in that tortuous channel, starless darkness would have halted the mission altogether.

Shifting his flag again to Scorpion, Perry and his squadron commenced the passage up the tortuous channels.

His soundings were the only significant guide for the gunboat as it threaded its way through the tortuous channel.

Verrazzano was unable to navigate the tortuous channels leading into the Pamlico Sound and assumed that China lay beyond the Outer Banks.

The lake is comparatively shallow and filled with sand banks, making its navigable channels tortuous and difficult.

In filtration, a multilayer lattice retains those particles that are unable to follow the tortuous channels of the filter.

It issues from whatever tortuous channels and dark tunnels like a flood at its fullest.

His heart sank, but almost at once, the boat turned again, following the tortuous channel of the stream.

His eyes scanned the river as far down-stream as the tortuous channel would permit, but there was no sign of the Russian or his dugout.