| tideland that is flat or nearly flat and often muddy or marshy. |
| tidal flat n. A nearly flat coastal area, alternately covered and exposed by the tides, and consisting of unconsolidated sediments. |
| tidal flat
A nearly flat coastal area that is alternately covered and exposed by tides and consisting of unconsolidated sediments and precipitated salts. A tidal flat is the middle part of a tidal basin, below the vegetation-supporting salt marsh and the low-tide mark. |