Definition of eubacterium
noun (plural eubacteria /-rɪə/)
- 1a bacterium of a large group typically having simple cells with rigid cell walls and often flagella for movement. The group comprises the ‘true’ bacteria and cyanobacteria, as distinct from archaea.
- Division (or subkingdom) Eubacteria, kingdom Monera; this group is sometimes taken to exclude non-rigid forms such as spirochaetes and mycoplasmas