n. [ Run + -let. ] A little run or stream; a streamlet; a brook. [ 1913 Webster ]
To trace out to its marshy source every runlet that has cast in its tiny pitcherful with the rest. Lowell. [ 1913 Webster ]
n. Same as Rundlet. “A stoup of sack, or a runlet of canary.” Sir W. Scott. [ 1913 Webster ]