- brewing yeast
- brewer's yeast (but this tends to be confused with the edible, deactivated version of this yeast)
About Beer yeast
Wikipedia Article About Beer yeast on Wikipedia
Beer yeast (also known as brewers yeast or brewing yeast) can mean any live yeast used in brewing. It can also mean yeast obtained as a by-product of brewing, dried and killed, and used as nutritional yeast.