The Collaborative International Dictionary
enterobacterium
enterobacterium \enterobacterium\ n. one of the enterobacteria; a member of the family Enterobacteriaceae.
Syn: enteric bacterium, enteric.
Wiktionary
enterobacterium
n. (context microbiology English) Any of very many gram-negative rod-shaped bacteria of the family Enterobacteriaceae, many of which are pathogenic.