A paramecium is an aquatic, oval-shaped single-celled microscopic organism that moves by means of hair-like projections called cilia. Paramecia are members of the Protozoan family, a group of the most primitive forms of animal life.
Paramecium is a genus of unicellular ciliate protozoa, formerly known as slipper animalcules from their slipper shape. They are commonly studied as a representative of the ciliate group. Paramecia range from about 50 to 350 Î¼m in length, depending on species.