lupulin
/ˈluːpjʊlɪn/
noun
- A yellow, powdery substance found in hops that gives beer its bitter flavor and helps preserve it.
- The lupulin in hops also has mild antibacterial properties.
- When you open a bag of hops, the lupulin dust can stick to your fingers.
- Brewers value lupulin for the bitterness it adds to beer.