- a yeast (Saccharomyces cerevisiae) used in brewing beer
- the byproduct yeast left after brewing, often used in medicine and foods and as a dietary supplement
Any of various yeasts, especially Saccharomyces cerevisiae, used as a ferment in brewing and also as a source of B-complex vitamins.
(plural brewer's yeasts)
- Any live yeast used in brewing or yeast obtained as a by-product of brewing, dried and killed, and used as nutritional yeast.