Definition of Eubacteria

eu·bac·te·ri·a

[yoo-bak-teer-ee-uh] 

plural noun, singular eu·bac·te·ri·um [yoo-bak-teer-ee-uhm]  Bacteriology .

spherical or rod-shaped bacteria of the order Eubacteriales, characterized by simple, undifferentiated cells with rigid walls; true bacteria.