rille
/rɪl/
noun
- A small, narrow channel or groove, especially on the surface of the moon or on a planet.
- Through a telescope, you can see a long rille stretching across the lunar surface.
- The scientist pointed out a winding rille in the high-resolution image of Mars.
- Ancient lava flows may have carved this rille into the moon's crust.
- A small stream or brook; a tiny channel of water.
- The hiker stopped to drink from a clear rille flowing down the mountainside.
- After the rain, a gentle rille formed along the edge of the garden path.
- Children played by the rille, watching leaves float downstream.