- any of certain long, narrow, straight or sinuous trenches or valleys observed on the surface of the moon.
Origin of rill2
Examples from the Web for rille
The main street crosses a narrow bridge, beneath which the quickly running current of the Rille or Risle flows.Normandy
G. E. Mitton
But the whole way from the castle to the Rille is blocked with modern buildings.Sketches of Travel in Normandy and Maine
Edward A. Freeman
Normandy, throughout the whole of its extent, can scarcely boast a lovelier stream than the Rille.
The small village of St. Sanson is situated upon the right bank of the Rille, within a league of its mouth.
The Rille, in every part of its current, is varied by an infinity of islands, formed by the division of its waters.
- a brook or stream; rivulet
- a small channel or gulley, such as one formed during soil erosion
- Also: rille one of many winding cracks on the moon
Word Origin and History for rille
"small brook, rivulet," 1530s, from or related to Dutch and Frisian ril, Low German rille "groove, furrow, running stream," probably from Proto-Germanic *ril- (cf. Old English rið, riþe "brook, stream," which survives only in dialects), a diminutive form from PIE root *reie- "to run, flow" (see Rhine).