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{%type%} Definitions

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Short "hint"

any of certain long, narrow, straight or sinuous trenches or valleys observed on the surface of the moon

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Usage examples (34)
  • The remnants of volcanic tubes on the moon whose roofs have capsized and a trench or valley is created is called a rille system, which is a groove or long narrow...
  • A sinuous rille ran off to the left, like a dry stream bed.
  • A new rille might have opened up only a few thousand years ago.
  • The prints down inside the rille were faint, but still visible.
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