n. [ Cf. LG. rille a small channel or brook, a furrow, a chamfer, OE. rigol a small brook, F. rigole a trench or furrow for water, W. rhill a row, rhigol a little ditch. √11. ] 1. A very small brook; a streamlet. [ 1913 Webster ]

2. (Astron.) See Rille. [ 1913 Webster ]

v. i. To run a small stream. [ R. ] Prior. [ 1913 Webster ]

n. [ G. rille a furrow. ] (Astron.) One of certain narrow, crooked valleys seen, by aid of the telescope, on the surface of the moon. [ 1913 Webster ]

n. A little rill. Burton. [ 1913 Webster ]