3 entries found for yeast.
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Main Entry: yeast
Pronunciation: yst, st
Function: noun 1 a: a one-celled fungus that produces alcohol during the process of fermentation; also: any of various similar fungi b: a yellowish foamy material that may occur on the surface of sweet liquids (as fruit juices) undergoing fermentation and that consists chiefly of yeast cells and carbon dioxide c: a commercial product containing living yeast cells that is used mostly in the making of alcoholic beverages and as a leaven especially in baking bread 2: something that causes motion or activity - yeasty /y-st, -st/ adjective