from The Century Dictionary and Cyclopedia
- n. The small ridge of sand heaped up by a wave at the limit of its advance when rolling in on a beach. Wave-marks are often preserved when the sand subsequently is buried and consolidated into rock.
Sorry, no etymologies found.
As the sea is to the shore so the wind is to the cloudy air; so, when the wind drops, this very straight and thin cloud is left, a sort of wave-mark in the air.