strandline

plural strandlines · alternative strand line

1. The linear mark left on a beach or coastal rocks by high water.
2. geographyThe line that marks the interface between land and a body of water; it changes periodically (depending on weather, tide, and season) and also over geologic time.

   1 more example

   The beach strandline is just as much a wildlife habitat as a woodland or wildflower meadow, and every bit as diverse and interesting. It has a dynamic nature, changing every day as organic debris from the sea is deposited on the beach to be gradually broken down by the strandline inhabitants; sometimes the whole strandline is buried in sand or shingle or submerged by storm waves.

   2015, Steve Trewhella, Julie Hatcher, The Essential Guide to Beachcombing and the Strandline, Wild Nature Press, →ISBN, page 235

   Synonyms: shoreline, waterline