baker's yeast; brewer's yeast
Refers to the yeast species Saccharomyces cerevisiae, used in baking and brewing. In everyday contexts, it typically means the yeast used for bread-making.
I baked homemade bread using baker's yeast.
Baker's yeast is also used in beer brewing.
Compound of パン (bread, from Portuguese pão) and 酵母 (yeast). The term directly describes yeast used for bread-making.