What is the name for sediment in wine?

Lees is composed of dead yeast cells, grape skins, tannins, and other particles that settle to the bottom of the wine during the aging process.

While some people may find lees unpleasant, it can actually add complexity and depth to the flavor of the wine. Some wines, like Chardonnay, are intentionally aged on the lees to develop a richer, more buttery flavor.

It's important to note that not all wine has lees, and not all wines are meant to be aged on the lees. Some wines are filtered to remove sediment, while others are aged on the lees for a specific period of time.