pseudopodium


pseudopodium
/sooh'deuh poh"dee euhm/, n., pl. pseudopodia /-dee euh/. Biol.
pseudopod.
[1850-55]

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also called  pseudopod 

      temporary or semipermanent extension of the cytoplasm, used in locomotion and feeding by all sarcodine protozoans (i.e., those with pseudopodia; see sarcodine) and some flagellate protozoans. Pseudopodia are formed by some cells of higher animals (e.g., white blood corpuscles) and by amoebas (amoeba). During amoeboid feeding, pseudopodia either flow around and engulf prey or trap it in a fine, sticky mesh.

      Protozoans have four types of pseudopodia. Lobopodia, characteristic of Amoeba, are blunt and fingerlike; filopodia are slender and tapering, occasionally forming simple, branched networks; reticulopodia, found in the foraminiferans, are branching filaments that fuse to form food traps; and axopodia, characteristic of the actinopods, are long and sticky (like reticulopodia) but radiate singly and have a stiff, internal rod composed of numerous microtubules. Lobopodia and filopodia are formed as the result of a pressure system; reticulopodia and axopodia depend on a two-way flow of cytoplasm.

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Universalium. 2010.

Look at other dictionaries:

  • Pseudopodium — Pseu do*po di*um, n.; pl. {Pseudopodia}. [NL.] Same as {Pseudopod}. [1913 Webster] …   The Collaborative International Dictionary of English

  • pseudopodium — PSEUDOPÓDIUM s.n. v. pseudopod. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • pseudopodium — [so͞o΄dōpäd΄so͞o΄də pō′dē əm] n. pl. pseudopodia [so͞o΄dō pō′dēə] [ModL: see PSEUDO & PODIUM] a temporary projection of the protoplasm of certain one celled organisms or of certain cells in multicellular animals, serving as a means of moving… …   English World dictionary

  • Pseudopodium — Scheinfüßchen (Pseudopodien, Einzahl: Pseudopodium) sind Plasmaausstülpungen der Amöben (Wechseltierchen) und phagozytierenden Zellen (z. B. Makrophagen), mit denen sie Nahrungspartikel umfließen und in ihren Zellleib einschließen. So ernähren… …   Deutsch Wikipedia

  • pseudopodium — noun (plural pseudopodia) Etymology: New Latin Date: 1854 1. a temporary protrusion or retractile process of the cytoplasm of a cell that functions (as in an amoeba) especially in a locomotor or food gathering capacity see amoeba illustration 2.… …   New Collegiate Dictionary

  • pseudopodium — n.; pl. dia [Gr. pseudos, false; pous, foot] 1. Temporary protrusion of the cell, associated with flowing movement of protoplasm, functioning in locomotion and feeding. 2. (ARTHROPODA: Insecta) An outgrowth or foot like appendage of the larval… …   Dictionary of invertebrate zoology

  • pseudopodium — noun A pseudopod …   Wiktionary

  • pseudopodium — A temporary protoplasmic process, put forth by an ameboid stage or amebic protozoan for locomotion or for prehension of food. SYN: pseudopod. [pseudo + G. pous, foot] * * * pseu·do·po·di·um .süd ə pōd ē əm n …   Medical dictionary

  • Pseudopodium — Pseu|do|po|di|um 〈n.; s, di|en〉 vorübergehende Bildung eines Fortsatzes aus Plasma, der vielen Wurzelfüßern die Fortbewegung ermöglicht; Sy Scheinfüßchen [<grch. pseudein „täuschen“ + pous, Gen. podos „Fuß“] * * * Pseu|do|po|di|um, das; s,… …   Universal-Lexikon

  • Pseudopodium — Pseu|do|po|di|um 〈n.; Gen.: s, Pl.: di|en; Biol.〉 vorübergehende Bildung eines Fortsatzes aus Plasma, der vielen Wurzelfüßern die Fortbewegung ermöglicht, Scheinfüßchen [Etym.: <Pseudo… + …podium] …   Lexikalische Deutsches Wörterbuch


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