The term 'Tiny Life Form' can be summarized by the crossword solution 'AMEBA' (5 letters). An ameba is a single-celled organism that belongs to the protozoa family. It is a microscopic organism that is found in water and soil, and it is capable of movement and feeding on other organisms. Amebas are among the simplest and smallest forms of life, and they are an important part of the food chain.