| Noun | 1. | Calymmatobacterium - a genus of bacterial rods containing only the one species that causes granuloma inguinale bacteria, bacterium - (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants Calymmatobacterium granulomatis - the species of bacteria that causes granuloma inguinale |