• Webster's Revised Unabridged Dictionary
    • n Potale The refuse from a grain distillery, used to fatten swine.
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Century Dictionary and Cyclopedia
    • n potale The residue left in the still from the first distillation of fermented wash in the manufacture of whisky. It contains a little lactic acid, which can be recovered and utilized in connection with dyeing processes.
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In literature:

I would recommend a little mixed potale from an early period, and increase it, so as to render them accustomed to the slop gradually.
"The Practical Distiller" by Samuel McHarry