mother of vinegar

noun phrase

Definition of mother of vinegar 

: a slimy membrane composed of yeast and bacterial cells that develops on the surface of alcoholic liquids undergoing acetous fermentation and is added to wine or cider to produce vinegar

called also mother

First Known Use of mother of vinegar

1601, in the meaning defined above

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The first known use of mother of vinegar was in 1601

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one that holds something together

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