GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Gyle (gīl), n. [F. guiller to ferment.  Cf. Guillevat.] Fermented wort used for making vinegar.
   
   [1913 Webster]
   
   Gyle tun (Brewing), a large vat in which wort ferments.
   
   [1913 Webster]