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:
“My only objection to the arrangements there is the two-in-a-bed system. It is bad.... But let your words and conduct be perfectly pure—such as your mother might know without bringing a blush to your cheek.... If not already mentioned, do not tell your mother of the doubling in bed.”
—Rutherford Birchard Hayes (1822–1893)
“Certainly, words can be as abusive as any blow. . . . When a three-year-old yells, “You’re so stupid! What a dummy!” it doesn’t carry the same weight as when a mother yells those words to a child. . . . Even if you don’t physically abuse young children, you can still drive them nuts with your words.”
—Mary Kay Blakely (20th century)
“He packs wool sheared in April, honey
in combs, linen, leather
tanned from deerhide,
and vinegar in a barrel
hooped by hand at the forge’s fire.”
—Donald Hall (b. 1928)