tidemark
🇺🇸
/ˈtaɪdmɑːrk/
🇬🇧
/ˈtaɪdmɑːk/
The highest point reached by a tide on a beach or shoreline.
After the storm, the tidemark on the beach was higher than usual.
嵐の後、ビーチの潮の跡がいつもより高かった。
A line left by dirty water in a bathtub after it has drained.
I noticed a tidemark around the inside of the bathtub after the kids' bath.
子供たちの入浴の後、浴槽の内側に潮の跡を見つけました。