The term PART OF A WINE GLASS can be summarized by the crossword solution STEM, which is a four-letter word. The STEM of a wine glass is the thin, cylindrical part that connects the bowl of the glass to the base. It is usually made of glass or metal and is designed to provide stability and balance to the glass. The STEM also helps to keep the drinker's hand away from the bowl of the glass, which helps to maintain the temperature of the wine.