A stringy slime composed of yeast cells and bacteria that forms on the surface of fermenting liquids and is added to wine or cider to start the production of vinegar.

• 醋母一种由发酵细胞和形成于发酵期流体表面的细菌组成的黏稠的粘状物，加于葡萄酒或苹果酒中以开始酒的生产过程