ul ose ▁and ▁ac etic ▁acid ▁b acter ia ▁that ▁develop s ▁on ▁fer ment ing ▁alco hol ic ▁liqu ids , ▁which ▁turns ▁alco hol ▁into ▁ac etic ▁acid ▁with ▁the ▁help ▁of ▁o xygen ▁from ▁the ▁air . ▁It ▁is ▁added ▁to ▁wine , ▁c ider , ▁or ▁other ▁alco hol ic ▁liqu ids ▁to ▁produce ▁vin eg ar . ▁▁ ▁Mother ▁of ▁vin eg ar ▁is ▁also ▁known ▁as ▁My c oder ma ▁ac eti , ▁a ▁New ▁Latin ▁expression , ▁from ▁the ▁Greek ▁ μ ύ κ η ς ▁(" f ung us ") ▁plus ▁ δ έ ρ μ α ▁(" sk in "), ▁and ▁the ▁Latin ▁ac eti ▁(" of ▁the ▁acid "). ▁ ▁The ▁naming ▁of ▁the ▁b acter ia ▁has ▁been ▁rather ▁fluid ▁due ▁to ▁its ▁original ▁identification ▁near ▁the ▁in ception ▁of ▁b acter i ology . ▁ ▁Currently , ▁the ▁preferred ▁naming ▁is ▁Ac et ob acter ▁ac eti . ▁ ▁Mother ▁of ▁vin eg ar ▁can ▁also ▁form ▁in ▁store - b ought ▁vin eg ar ▁if ▁there ▁is ▁some ▁non - fer ment ed ▁sugar ▁and / or ▁alco hol ▁contained ▁in ▁the ▁vin eg ar . ▁This ▁is ▁more ▁common ▁in ▁un paste ur ized ▁vin eg ar . ▁While ▁not ▁app et izing ▁in ▁appearance , ▁mother ▁of ▁vin eg ar ▁is ▁completely ▁har ml ess ▁and ▁the ▁surrounding ▁vin eg ar ▁does ▁not ▁have ▁to ▁be ▁disc arded ▁because ▁of ▁it . ▁It ▁can ▁be ▁filtered ▁out ▁using