[{"Bold_text": "noun", "List Items": ["any of numerous freshwater, marine, or parasitic one-celled protozoa of the order Amoebida, characterized by a granular nucleus surrounded by a jellylike mass of cytoplasm that forms temporary extensions, or pseudopodia, by which the organism moves, engulfs food particles, and forms food vacuoles.", "a protozoan of the genus Amoeba,inhabiting bottom vegetation of freshwater ponds and streams: used widely in laboratory studies."]}]