tidemark

• Marque ou ligne laissée sur une surface, comme une plage ou une baignoire, indiquant le niveau le plus haut ou le plus bas atteint par la marée ou l'eau.

A line or mark left on a surface, such as a beach or a bathtub, indicating the highest or lowest level reached by the tide or water.

1. High-water markB2formal

   A line or mark left on a shore or beach indicating the highest or lowest point reached by the tide.

   Laisse de haute mer

   • The tidemark on the sand showed where the water had reached.
   • We could see a clear tidemark on the rocks after the storm.
   • The tidemark was unusually high this morning.

   Synonymeshigh-water markwatermark

2. Dirt line on skinC1informalbritish

   A line of dirt or grime on a person's skin, especially on the neck, indicating incomplete washing.

   ligne de crasse sur la peau

   • The child had a tidemark around his neck after playing outside.
   • She noticed a tidemark on her arm after gardening.
   • He scrubbed the tidemark off his skin in the shower.