The term 'Protozoan of Ever-Changing Shape' can be summarized as an AMOEBA, which is a single-celled organism that belongs to the kingdom Protista. It is characterized by its ever-changing shape, which is due to its ability to move and change form through a process called cytoplasmic streaming. Amoebas are found in many different environments, including freshwater, marine, and soil habitats. They feed on bacteria and other small organisms, and reproduce asexually.