What term describes the wine that clings to the side of the glass after swirling?

The term that describes the wine that clings to the side of the glass after swirling is "legs." This phenomenon occurs due to the interaction between the alcohol and water content of the wine, as well as its viscosity. When you swirl the wine, it coats the sides of the glass, and as it slowly runs back down, these streaks or droplets are referred to as "legs."

The presence and characteristics of the legs can give insight into the wine’s alcohol content and sugar levels; for instance, wines with higher alcohol content and residual sugar tend to have more pronounced legs. Recognizing and understanding legs can help bartenders and wine enthusiasts evaluate the quality and flavor profile of a wine visually.

Other terms like aroma and bouquet refer primarily to the scents and fragrances that come from the wine, rather than its physical behavior in the glass. Body pertains to the weight and fullness of the wine in the mouth but does not connect to how it interacts with the glass itself.