👉 The term "oenological" is a blend of the French words for wine and "ology", which refers to knowledge or study. It describes the process by which grape juice, usually from a variety of grapes, is fermented into wine. The process involves fermenting the juice with yeast, which then transforms it into alcohol through the action of microorganisms in the fermentation vessel. This process can vary widely depending on the region and the specific grape varieties used.