[ ˌju:bak'tɪərɪə ]
■ plural noun ( sing. eubacterium ) Biology a large group of bacteria with simple cells and rigid cell walls, comprising the ‘true’ bacteria and cyanobacteria as distinct from archaea.
Derivatives
~l adjective
Origin
1930s: from mod. L Eubacterium (genus name), from eu- (in sense 'normal') + bacterium .