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The Collaborative International Dictionary
Poak

Poak \Poak\, Poake \Poake\, n. Waste matter from the preparation of skins, consisting of hair, lime, oil, etc.

Wiktionary
poak

alt. waste matter from the preparation of skins, consisting of hair, lime, oil, etc. n. waste matter from the preparation of skins, consisting of hair, lime, oil, etc.