shoreline

Etymology

From shore + line.

shoreline means the divide between land and a body of water. Lexicurio rates it Distinctive — a strength score of 67 out of 100.

noun

The divide between land and a body of water.“An algae bloom has killed thousands of fish in the San Francisco Bay Area in recent weeks, officials say, forcing shoreline cleanups, spreading unpleasant odor and spurring scientists to further investigate the extent of the ecological damage.”
The line on a map that illustrates this.