YEAST
- to ferment (to undergo a type of chemical reaction) [v -ED, -ING, -S]
- commercial product containing yeast fungi in a moist or dry medium
- to foam (to form foam (a light, bubbly, gas and liquid mass)) [v YEASTED, YEASTING, YEASTS]
- unicellular fungus that is present and functionally active in yeast, usually has little or no mycelium, and reproduces by budding
- fungus causing fermentation, used in brewing alcoholic beverages and as a leaven in baking bread