Webster’s Revised Unabridged Dictionary · 1913 Argol Ar′gol (är′gŏl), n. [Cf. Argal, Orgal. Of unknown origin.] Crude tartar; an acidulous salt from which cream of tartar is prepared. It exists in the juice of grapes, and is deposited from wines on the sides of the casks. Ure. ‹ Argoile Argolic ›