Oenology: the science and study of wine and winemaking. Oenology focuses on the study of the wine making process from crushing to serving and everything in between, including the must, fermentation, racking, bottling, and aging of wine. Specifically, oenology studies the science of the complicated chemical reactions that take place in the grape juice as it becomes wine. An oenologist is an expert in the fields comprehended by the "Viticulture and Oenology" designation for oenology-training programmes and research centres that include schooling, training, and education in the outdoor and indoors aspects of wine and the making of wine.