Glossary
Foeder
A large upright wooden vessel, typically holding thousands of litres, used for long maturation in Flemish and lambic brewing.
Pronounced FOO-der.
Also called foudre, tun.
The scale matters: a foeder has a much lower surface-area-to-volume ratio than a barrel, so it contributes far less wood character and far slower oxygen ingress. It functions as a stable home for a resident microbial population rather than as a flavouring vessel.
Related
- Barrel ageing — The broader practice.
- Flanders red ale — The style matured this way.
More vocabulary
Beer engine · Coolship · Hydrometer · Kettle · Lauter tun · Mash tun · Refractometer · Sparkler
See every term on the glossary index.
Last reviewed 2026-08-16.