What does corynebacterium mean?
Corynebacterium is the name of a genus of bacteria — and, by extension, of any single member of that group. These are Gram-positive, mostly non-motile, rod-shaped organisms whose cells often taper into a distinctive club shape at one end, a feature reflected in the genus name, derived from the Greek word koryne, meaning 'club'. The most historically significant member is Corynebacterium diphtheriae, the agent of diphtheria, a serious respiratory disease largely controlled today by widespread vaccination. Most other species are benign; many live harmlessly on human skin and mucous membranes, though some act as opportunistic pathogens in vulnerable patients. The term is essentially confined to microbiology and clinical medicine, appearing in laboratory reports, research literature, and medical education rather than everyday speech. Its plural is corynebacteria, and related terms such as coryneform ('club-shaped') share the same Greek root.
nounA bacterium belonging to Corynebacterium, a genus of Gram-positive, generally non-motile, rod-shaped bacteria, many of which are club-shaped at one end. The genus includes the diphtheria-causing pathogen Corynebacterium diphtheriae as well as numerous harmless species found on skin and mucous membranes.
- A single-celled microorganism of the bacterial genus Corynebacterium, characterized by its Gram-positive, rod-like, often club-ended morphology.
"The throat swab revealed Corynebacterium diphtheriae, confirming the diagnosis."
"Laboratory cultures identified the organism as a Corynebacterium rather than a streptococcus."
"Some Corynebacterium species are normal residents of healthy human skin."
Standard plural in both clinical and scientific contexts, following Latin-style pluralization of the -um ending.
"Corynebacteria are commonly isolated from skin swabs."
Its name literally means 'club-shaped little rod' in Greek — a fitting label for the bacterium behind diphtheria, once among childhood's deadliest diseases.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of corynebacterium
The word derives from New Latin Corynebacterium, formed from the Greek korynē, meaning 'club', combined with 'bacterium', itself from the Greek baktērion, 'small staff or rod'. It was coined in the late 19th century following the identification of the diphtheria bacillus. The same Greek root appears in the microbiological adjective coryneform, meaning club-shaped.
Related word forms
How corynebacterium is actually used
A technical term used almost exclusively in microbiology, medicine, and related sciences. In scientific writing it is typically italicized when referring to the genus name (Corynebacterium) but set in roman type when used generically for an individual bacterium. It is rare outside professional contexts.
Easily confused with corynebacterium
Both are Gram-positive rod-shaped bacterial genera, but Clostridium species are anaerobic spore-formers, whereas corynebacteria are aerobic or facultative and do not form spores.