Amurca

Amurca is the bitter-tasting, dark-colored, watery sediment that settles out of unfiltered olive oil over time. It is also known as `olive oil lees` in English and Turtub in Jordan. Historically, amurca was used for numerous purposes, including as a building material, pesticide, herbicide, and even as an astringent, which was called by the same .....
Found on http://en.wikipedia.org/wiki/Amurca
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