Escherichia

World English Dictionary
Escherichia (ˌɛʃəˈrɪkɪə)
 
n
a genus of Gram-negative rodlike bacteria that are found in the intestines of humans and many animals, esp E. coli, which is sometimes pathogenic and is widely used in genetic research
 
[C19: named after Theodor Escherich (1857--1911), German paediatrician who first described E. coli]

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American Heritage
Medical Dictionary

Escherichia Esch·e·rich·i·a (ěsh'ə-rĭk'ē-ə)
n.
A genus of aerobic, gram-negative, rod-shaped bacteria widely found in nature; one species, Escherichia coli, which normally occurs in human and animal intestines, can cause urogenital tract infections and diarrhea in infants and adults.

The American Heritage® Stedman's Medical Dictionary
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