a. [f. URACH-US + -AL.] Of or pertaining to, affecting or found on, the urachus.

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1890.  Billings, Med. Dict.

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1905.  H. D. Rolleston, Dis. Liver, 251. Various abdominal cysts, such as pancreatic, omental, chylous, urachal, mesenteric cysts.

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