Album Graecum

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Al´bum Grae´cum

1.Dung of dogs or hyenas, which becomes white by exposure to air. It is used in dressing leather, and was formerly used in medicine.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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ALBUM graecum is the dung of dogs or hyenas that has become white through exposure to the air.