- a genus of rod- or coccus-shaped aerobic Gram-negative bacteria, certain species of which, as L. pneumophila, produce legionnaires' disease.
Origin of Legionella
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any Gram-negative rod-shaped bacterium of the genus Legionella, including L. pneumophila, which causes legionnaire's disease
C20: New Latin, diminutive of legion, as in legionnaire's disease
- A genus of gram-negative bacilli that includes the species that causes Legionnaires' disease.