noun
- crude potassium bitartrate deposited as a crust on the inside of wine casks during fermentation
Usage: also called argol; technical/chemistry term
Examples
- The winemaker scraped argal from the barrel walls.
- Argal is collected and refined to produce cream of tartar.
- The red argal deposits indicated the wine had fermented properly.
- Historically, argal was an important byproduct of wine production.