Definition of enterobacterium
: any of a family (Enterobacteriaceae) of gram-negative straight rod bacteria (such as a salmonella, a shigella, or E. coli) that ferment glucose and include saprophytes as well as some serious plant and animal pathogens
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Merriam-Webster unabridged
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Time Traveler for enterobacterium
The first known use of enterobacterium was in 1929
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