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| moth·er [ múər ] |
noun |
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| Definition: |
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slimy mass on vinegary liquid: a slimy mass of bacteria and yeast cells that forms on the surface of alcohol being converted into acetic acid. It is added to wine or cider to make vinegar.
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| [Mid-16th century. Probably < obsolete Dutch moeder< Middle Dutch moeder "female parent"; from its part in the production of vinegar] |
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