Yeast

From LoveToKnow 1911

'YEAST (O.E.' giest or gyst; the root yes-, to boil, ferment, is seen in Sansk. nir-yasa, exudations from trees, and Gr. "Eecp, to boil), a cellular organism produced in the alcoholic fermentation of saccharine liquids (see Fungi, Fermentation, Brewing).


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