rill

Definitions of rill
1

n a small stream

Synonyms:
rivulet, run, runnel, streamlet
Type of:
stream, watercourse
a natural body of running water flowing on or under the earth

n a small channel (as one formed by soil erosion)

Type of:
channel
a deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels

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