brewer's yeast

American  

noun

1. a yeast, as of the genus Saccharomyces, suitable for use as a ferment in the manufacture of wine and beer.

---

brewer's yeast British  

noun

1. a yeast, Saccharomyces cerevisiae , used in brewing See yeast

2. yeast obtained as a by-product of brewing

---

Etymology

Origin of brewer's yeast

First recorded in 1915–20

Example Sentences

See Examples For:

brewer's yeast

Many of the raw ingredients used to make beer, including barley, wheat and brewer's yeast, contain vitamin B6 and the brewing process doesn't kill it all off, research suggests.

From BBC ● Apr. 22, 2026

We found previously unknown centromeres in related yeast species that look like halfway stages between large, repeat-rich centromeres and the tiny ones in brewer's yeast.

From Science Daily ● Mar. 10, 2026

Fred Walker, who produced canned foods, hired food technologist Cyril P. Callister to create a homegrown yeast spread using brewer's yeast from the Carlton Brewery.

From Salon ● Jul. 10, 2023

Still another bacterium, the familiar E. coli, transferred DNA into brewer’s yeast, which is a fungus.

From New York Times ● Aug. 13, 2018

Dussel caught with brewer’s yeast tablets, while we’ve got none.

From "The Diary of a Young Girl" by Anne Frank