Meaning & History. Derived from Latin leo meaning lion, a cognate of LEON. It was popular among early Christians and was the name of 13 popes, including Saint Leo the Great who asserted the dominance of the Roman bishops (the popes) over all others in the 5th century. It was also borne by six Byzantine emperors and five Armenian kings.
Yeast is a good example of an organism that undergoes alcoholic fermentation. The same process that goes on in the mitochondria during lactic acid fermentation also happens in alcoholic fermentation. The only difference is that the byproduct of alcoholic fermentation is ethyl alcohol.
Fermentation is believed to have been the primary means of energy production in earlier organisms before oxygen was at high concentration in the atmosphere, and thus would represent a more ancient form of energy production in cells. Fermentation occurs naturally but humans have used and controlled the process. It is used in the production of alcohol, bread, vinegar, and other food or industrial products: Fermentation (food) - the conversion of carbohydrates into alcohols or acids under anaerobic conditions used for making certain foods.