An obsolete name for an order of bacteria that contained simple, undifferentiated, rigid cells which were either spheres or straight rods. It contained motile (peritrichous) and nonmotile, Gram-negative and Gram-positive, and sporeforming and nonsporeforming species. The order contained 13 families: Achromobacteriaceae, Azotobacteriaceae, Bacillaceae, Bacteroidaceae, Brevibacteriaceae, Brucellaceae, Corynebacteriaceae, Enterobacteriaceae, Lactobacillaceae, Micrococcaceae, Neisseriaceae, Propionibacteriaceae, and Rhizobacteriaceae.
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Eu·bac·te·ri·a·les .yü-(.)bak-.tir-ē-'ā-(.)lēz n pl in some former classifications an order of the class Schizomycetes comprising relatively simple nonfilamentous unbranched bacteria that show no visible sulfur or iron particles and that include spherical and rod-shaped forms
Medical dictionary. 2011.