micro-bacteria

plural noun, singular mi·cro·bac·te·ri·um [mahy-kroh-bak-teer-ee-uh m] /ˌmaɪ kroʊ bækˈtɪər i əm/. Bacteriology.

1. rod-shaped, thermoduric, saprophytic bacteria of the genus Microbacterium, found chiefly in dairy products.