Eu·bac·te·ria .yü-bak-'tir-ē-ə n pl a subkingdom of prokaryotic microorganisms that is equivalent to the domain Bacteria in the three-domain classification of living things, that comprises microorganisms either lacking a cell wall, having a thick cell wall of peptidoglycan, or having a thin cell wall of peptidoglycan with an outer layer of lipoprotein, and that includes most of the familiar bacteria of medical and economic importance
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pl. n.
a very large group of bacteria with rigid cell walls and - typically - flagella for movement. The group comprises the so-called 'true' bacteria, excluding those, such as spirochaetes and mycoplasmas, with flexible cell walls.
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Eu·bac·te·ria (u″bak-teґre-ə) [eu- + Gr. baktērion small rod] Bacteria.Medical dictionary. 2011.