Any of a group of chemical reactions induced by living or nonliving ferments that split complex organic compounds into relatively simple substances, especially the anaerobic conversion of sugar to carbon dioxide and alcohol by yeast.

• 发酵由将复杂的有机化合物分解为相对简单的物质的生物酶，或非生物酶引起的任何一组化学反应，尤其是由酵母菌引起的从糖到二氧化碳和氢氧化物的厌氧微生物转化