An amoeba (also ameba, amoeba amœba or) amoeboid is a type of cell or organism which has the ability to alter its, shape primarily by extending and retracting.
noun. An example of an amoeba. An example of an amoeba. The definition of an amoeba is a one-celled organism, common in water and soil, possessing no set cell organs, structure, or defining shape. (plural amoebae or amoebas). ( 1 biology) A genus of unicellular protozoa that moves by means of temporary projections called pseudopodia. ( 2 mathematics) The graph of the real part of the logarithms of a polynomial equation in complex numbers. : any of a large genus (Amoeba) of naked rhizopod protozoans with lobed and never anastomosing pseudopodia, without permanent organelles or supporting structures, and of wide distribution in fresh and salt water and moist terrestrial environments; broadly: a naked rhizopod or other amoeboid protozoan.  a·moe·ba. Plural amoebas or amoebae (ə-mē′bē). A one-celled microscopic organism that constantly changes shape by forming pseudopods, temporary projections that are used for movement and for the ingestion of food. Amoebas are members of the group of organisms called protozoans. 1. amoeba-naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion. ameba. rhizopod, rhizopodan-protozoa characterized by a pseudopod. Amoebida, Amoebina, order Amoebida, order Amoebina-the animal order including amoebas. endameba-any ameba of the genus Endamoeba. Amoeba. Amoeba (also spelled ameba) is a genus of protozoa that moves by means of temporary projections called pseudopods (false feet), and is well-known as a representative unicellular organism. The word amoeba is also used to refer to both this genus and its close relatives, now grouped as the Amoebozoa, as well as to refer to all unicellular organisms that move by pseudopods. The pseudopods, or false feet, result from the extension of cytoplasm outward. An amoeba is a type of unicellular organism usually found in water around decaying vegetation, in wet soil and in animals such as humans. It is relatively advanced, and can extend and retract blob-like arms called pseudopodia, which it can use to grasp food particles and to propel itself through microscopic terrain. Amoebas use arms called pseudopods to acquire food. The transparency of most amoebas makes them ideal subjects for microscopic study. It is believed that amoeba were first viewed under a microscope in the mid-1700s. The protists are a group of life forms that are neither plant nor animal. An amoeba (also ameba, amoeba amœba or) amoeboid is a type of cell or organism which has the ability to alter its, shape primarily by extending and retracting. pseudopods Microbiologists often use the terms amoeboid and amoebae interchangeably for any organism that exhibits amoeboid movement. In older classification systems, most amoebae were placed in the class or subphylum Sarcodina, a grouping of single-celled organisms that possess pseudopods or move by protoplasmic flow. Acanthamoeba. An amoeba (also ameba, amoeba amœba or) amoeboid is a type of cell or organism which has the ability to alter its, shape primarily by extending and retracting. Pseudopods amoebae do not form a single taxonomic, group but are found in every major lineage of eukaryotic. organisms Microbiologists often use the terms amoeboid and amoebae interchangeably for any organism that exhibits amoeboid movement. In older classification systems, most amoebae were placed in the class or subphylum Sarcodina, a grouping of single-celled organisms that possess pseudopods or move by protoplasmic flow. The plural of amoeba is spelled either amoebas or amoebae. The word amoeba is also used to refer to both this genus and its close relatives, now grouped as the Amoebozoa, as well as to refer to all unicellular organisms that move by pseudopods. The pseudopods, or false feet, result from the extension of cytoplasm outward. Amoebas, like all protists, are single-celled organisms. Cells are the building blocks for all life forms. Single-celled means that amoebas have only one cell for their entire body. A human body has more cells than you can count. The inside of an amoeba is a jelly-like fluid called cytoplasm. Bits of food and other materials float around in the protoplasm. Amoebas are so tiny that you need a microscope to see them.  Amoeba is a genus of single-celled amoeboid protists in the family Amoebidae. The type species of the genus is Amoeba proteus, a common freshwater organism, widely studied in classrooms and laboratories. 
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