Definition of saccharomyces
: any of a genus (Saccharomyces of the family Saccharomycetaceae) of usually unicellular yeasts (such as a brewer's yeast) that are distinguished by their sparse or absent mycelium and by their facility in reproducing asexually by budding
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Merriam-Webster unabridged
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Time Traveler for saccharomyces
The first known use of saccharomyces was in 1873
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