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ar·gol(är′gôl′) also ar·gal (-gəl)
Crude potassium bitartrate, a by-product of winemaking.
[Middle English argoile, from Anglo-Norman argoil, ultimately from Latin argilla, clay; see argil.]
(Elements & Compounds) crude potassium hydrogentartrate, deposited as a crust on the sides of wine vats
[C14: from Anglo-French argoil, of unknown origin]
a crude tartar produced as a by-product of grape fermentation and used in dyeing, in tartaric acid, and in fertilizers.
[1350–1400; Middle English argul, argoile < Anglo-French argoil « Latin argilla clay]