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

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

Originally developed as a resourceful use of leftover brewer's yeast, Marmite gained popularity with 20th century families for its high concentration of B12 and folic acid.

From Salon • Sep. 26, 2023

But while brewer’s yeast is common enough, how the lager yeast’s other parent wound up in Bavaria has been harder to trace.

From New York Times • Dec. 7, 2022

Reed is studying nutritional supplements such as “pollen patties,” which are artificial discs the size of a small burger patties made from brewer’s yeast and other ingredients.

From Seattle Times • Oct. 30, 2022

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

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