आटे, शराब आदि को सड़ाने के लिए उपयोग में लाया जानेवाला एक पदार्थ।

A commercial leavening agent containing yeast cells. Used to raise the dough in making bread and for fermenting beer or whiskey.

गूँधे हुए आटे या फल आदि का सड़ाव।

A process in which an agent causes an organic substance to break down into simpler substances. Especially, the anaerobic breakdown of sugar into alcohol.