Dictionary
ar•gol
Pronunciation: (är'gul), [key]—
n.
a crude tartar, produced as a by-product in casks by the fermentation of wine grapes, used as a mordant in dyeing, in the manufacture of tartaric acid, and in fertilizers.
Also,argal.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.