Mother of vinegar - also called Mycoderma aceti (a New Latin expression, from the Greek μὑκης (fungus) plus δἐρμα (skin), and the Latin aceti (of the acid) - is a substance composed of a form of cellulose and acetic acid bacteria that develops on fermenting alcoholic liquids, which turns alcohol into acetic acid with the help of oxygen from the air. It is added to wine, cider, or other alcoholic liquids to produce vinegar.
Mother of vinegar can also form in store-bought vinegar if there is some non-fermented sugar and/or alcohol contained in the vinegar. This is more common in unpasteurized vinegar. While not appetizing in appearance, mother of vinegar is completely harmless and the surrounding vinegar does not have to be discarded because of it. It can be filtered out using a coffee filter, used to start a bottle of vinegar, or simply left in and ignored.
Famous quotes containing the words mother of, mother and/or vinegar:
“And that good Joan whom Englishmen
At Rouen doomed and burned her there,—
Mother of God, where are they then? . . .”
—Francois Villon (1431–1465)
“What I would like to give my daughter is freedom. And this is something that must be given by example, not by exhortation. Freedom is a loose leash, a license to be different from your mother and still be loved. . . . Freedom is . . . not insisting that your daughter share your limitations. Freedom also means letting your daughter reject you when she needs to and come back when she needs to. Freedom is unconditional love.”
—Erica Jong (20th century)
“Until, on Vinegar Hill, the fatal conclave.
Terraced thousands died, shaking scythes at cannon.
The hillside blushed, soaked in our broken wave.
They buried us without shroud or coffin
And in August the barley grew up out of the grave.”
—Seamus Heaney (b. 1939)