Noun: yeast yeest
- Any of various single-celled fungi that reproduce asexually by budding or division
"Brewers use yeast to ferment beer"
- A commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey
"The baker added yeast to the dough to help it rise";
- barm [Brit]
Derived forms: yeasts
Type of: fungus, leaven, leavening
Part of: Endomycetales, order Endomycetales
Encyclopedia: Yeast