Noun
nutritional yeast (countable and uncountable, plural nutritional yeasts)
A pale yellow preparation of the yeast Saccharomyces cerevisiae, often used as a nutritional supplement and flavoring by vegetarians and vegans due to its high protein content and selection of B vitamins.
The fad for yeast cakes lasted until the late 1930s. citation Nutritional yeast has a nutty, cheesy flavor that makes it popular as an ingredient in cheese substitutes. Source: Internet
Nutritional yeast is a common substitute for the taste of cheese in vegan recipes. Source: Internet
Nutritional yeast is a deactivated yeast, usually S. cerevisiae. Source: Internet