The term 'Amoeba' refers to a single-celled organism belonging to the kingdom Protista. It is also known as a CELL (4 letters), PROTOZOAN (9 letters), animalcule (10 letters) or one-celled animal (15 letters). Amoebas are found in freshwater, soil and marine environments, and they feed on bacteria and other small organisms. They reproduce by binary fission, which is the process of splitting into two identical daughter cells. Amoebas are an important part of the food chain and play a vital role in the environment.