archaebacteria

/ahr'kee bak tear"ee euh/, n. pl., sing. archaebacterium /-tear"ee euhm/.
a group of microorganisms, including the methanogens and certain halophiles and thermoacidophiles, that have RNA sequences, coenzymes, and a cell wall composition that are different from all other organisms: considered to be an ancient form of life that evolved separately from the bacteria and blue-green algae and sometimes classified as a kingdom.
Also, archaeobacteria /ahr'kee oh bak tear"ee euh/.
[1977; < NL, equiv. to archae-, irreg. for archaeo- ARCHAEO- (perh. an erroneous Latinizing of Gk arche- ARCHE-) + bacteria BACTERIA]

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Group of bacteria whose members differ from the eubacteria in certain physical, physiological, and genetic features (e.g., cell-wall components).

Archaebacteria are aquatic or terrestrial microorganisms that exhibit a diversity of shapes, including spherical, rod-shaped, and spiral forms. They survive in various extreme environments, including very hot or salty ones. Some require oxygen; some do not. Some produce methane as an end product; others depend on sulfur for their metabolism.

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Universalium. 2010.

Look at other dictionaries:

  • archaebacteria — [är΄kē bak tir′ē ə] pl.n. sing. archaebacterium [är΄kē bak tir′əm] or archaebacteria any of a large group of primitive bacteria having unusual cell walls, membrane lipids, ribosomes, and RNA sequences, and having the ability to produce methane… …   English World dictionary

  • archaebacteria — organismo procariota capaz de vivir en condiciones extremas Diccionario ilustrado de Términos Médicos.. Alvaro Galiano. 2010 …   Diccionario médico

  • Archaebacteria — Archaebacteria, Archaebakterien, einem eigenen Überreich Archaea (Archaeen) zugeordnete Organismengruppe mit bisher 100 bis 200 beschriebenen Arten. Die A. wurden nach ihrer Entdeckung zunächst vielfach mit den Bakterien zum Überreich der… …   Deutsch wörterbuch der biologie

  • archaebacteria — (n.) plural of archaebacterium (1977), from ARCHAEO (Cf. archaeo ) + bacterium (see BACTERIA (Cf. bacteria)) …   Etymology dictionary

  • Archaebacteria — Archaea Archées …   Wikipédia en Français

  • Archaebacteria — One of two major subdivisions of the prokaryotes. There are three main Orders, extreme halophiles, methanobacteria, and sulphur dependant extreme thermophiles. Archaebacteria differ from Eubacteria in ribosomal structure, the possession (in some… …   Dictionary of molecular biology

  • archaebacteria — noun considered ancient life forms that evolved separately from bacteria and blue green algae • Syn: ↑archaebacterium, ↑archaeobacteria, ↑archeobacteria • Hypernyms: ↑moneran, ↑moneron • Hyponyms: ↑ …   Useful english dictionary

  • archaebacteria — Grupo de bacterias cuyos miembros difieren de las eubacterias en ciertas características físicas, fisiológicas y genéticas (p. ej., los componentes de la pared celular). Las archaebacterias son microorganismos acuáticos o terrestres que presentan …   Enciclopedia Universal

  • archaebacteria — [ˌα:kɪbak tɪərɪə] plural noun (sing. archaebacterium) another term for archaea. Derivatives archaebacterial adjective …   English new terms dictionary

  • archaebacteria — ar•chae•bac•te•ri•a [[t]ˌɑr ki bækˈtɪər i ə[/t]] also ar•chae•o•bac•te•ri•a [[t]ˌɑr ki oʊ [/t]] n. pl. sing. te•ri•um [[t] ˈtɪər i əm[/t]] mcr a group of microorganisms, including methanogens and halobacteria, that are genetically and… …   From formal English to slang

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