tidemark
noun /ˈtaɪdmɑːk/
/ˈtaɪdmɑːrk/
- a line that is made by the sea on a beach at the highest point that the sea reaches
Topics Transport by waterc2, Geographyc2(海滩上的)高潮痕 - (British English, informal) a line that is left around the inside of a bath by dirty water
(污水在浴缸内侧留下的一圈)垢痕