Webster's Revised Unabridged Dictionary · 1913

Runlet

Runlet , noun

[Run + -let.]

A little run or stream; a streamlet; a brook.
To trace out to its marshy source every runlet that has cast in its tiny pitcherful with the rest. — Lowell

Runlet , noun

Same as Rundlet.
A stoup of sack, or a runlet of canary. — Sir W. Scott