rundlet

noun3

1. •
   A small cask of no certain dimensions, which may contain from 3 to 20 gallons.
2. •
   Such a cask of a certain size; its volume used as a measure for liquids, especially wine, usually 18.5 gallons.
3. •
   (no longer used) A partial or secondary umbel.

   • Rundlets roundish, with many equal, bristle-shaped spokes. — 1818