mother of vinegar
A jar of homemade vinegar contains a cloudy mother of vinegar floating on the surface.
Noun (countable and uncountable): "mother of vinegar" refers to a gelatinous, slimy mass composed of acetic acid bacteria and cellulose that forms on the surface of fermenting alcoholic liquids, such as wine or cider, during the production of vinegar. It is the living culture that converts alcohol into acetic acid, the key component of vinegar.
- (The bacterial culture initiates the conversion of alcohol to vinegar.)
- (The gelatinous mass appeared as a sign of active fermentation.)
- (The culture should be separated from the final product.)
"to cultivate mother of vinegar": to intentionally grow and maintain the bacterial culture for vinegar production.
- Experienced vinegar makers cultivate mother of vinegar in a sterile environment to ensure consistent quality. (They grow the culture carefully for reliable results.)
"mother of vinegar as a starter": the culture used to inoculate new batches of alcohol for vinegar production.
- She saved a jar of mother of vinegar from her last batch to use as a starter for the next one. (She reused the culture to begin a new fermentation.)
Vinegar mother (n): an alternative term for "mother of vinegar," referring to the same bacterial culture.
- The vinegar mother can be divided and shared with other home brewers. (The culture can be split for distribution.)
Mother (n, in vinegar-making context): a shortened form often used by artisans to refer to the culture.
- Add a piece of mother to the cider to make vinegar. (Add the bacterial culture.)
- Acetic acid bacteria: the scientific name for the bacteria that produce acetic acid.
- Vinegar culture: a general term for the microbial community used in vinegar production.
- Starter culture: a broader term for any microbial culture used to begin fermentation.
Like mother of vinegar: used metaphorically to describe something that forms a thick, gelatinous layer on a liquid.
- The pond scum was thick and slimy, like mother of vinegar on old wine. (The layer resembled the bacterial culture in appearance.)
To have a mother of vinegar in one's wine: an old-fashioned expression meaning to have a problem or impurity that spoils something.
- His plan had a mother of vinegar in it — a hidden flaw that ruined the whole project. (A hidden defect spoiled the endeavor.)