Meaning & use
Rill
Last updated
A small stream or brook, or a long, narrow channel or groove, especially on a hillside or planetary surface.
See it in a sentence
A shallow rill trickled down the hillside after the rain.
Astronomers observed a long rill winding across the lunar surface.
A note on using this word
In geology and astronomy, "rill" also describes long, narrow depressions on the surface of the Moon or Mars, thought to be ancient lava channels.
Words with a similar meaning
brookstreamlet
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