legionella

noun

le·​gion·​el·​la ˌlē-jə-ˈnel-ə 

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