legionella

noun
le·gion·el·la | \ ˌlē-jə-ˈnel-ə \

Medical Definition of legionella 

1 capitalized : a genus of gram-negative rod-shaped bacteria (family Legionellaceae) that includes the causative agent (L. pneumophila) of Legionnaires' disease

2 plural legionellae\-ˌē\ also legionellas : a bacterium of the genus Legionella

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