tundish

noun

1. A kind of funnel used in brewing fitting into the bung-hole of a tun or cask.

   “For filling a bottle with a Tunne-dish.”

   “That? said Stephen. Is that called a funnel? Is it not a tundish?”

2. A funnel used in smelting, foundry work etc.
3. A funnel used to create a siphonic break in a drainage system and/or provide visual indication of flow, usually in an overflow line.