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Webster's Dictionary (1865)

Är'gŏl, n.

noun

n. [Cf. ARGIL and ORGAL.]

  1. 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.
  2. The dried dung of cattle used for fuel in Tartary and elsewhere. Huc.