Rille
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 A long, narrow depression that resembles a channel, found on the surface of various lunar and planetary bodies.
Synonyms
All synonymsEtymology
Borrowed from German Rille (“channel”).
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.