tor·u·la yeast 
(tôryə-lə, -ə-lə, tŏr-)
(tôryə-lə, -ə-lə, tŏr-)n.
A protein-rich product made from the yeastlike fungus Candida utilis (formerly Torula utilis), used as a food additive and in animal feed.
[New Latin Torula, former fungus genus, feminine diminutive of torus, bulge.]