Cell theory refers to the scientific principle that all living organisms are made up of cells. When describing this fundamental concept, it's important to have a variety of synonyms at your disposal to make your writing more engaging and dynamic. Some possible synonyms for cell theory include the cell doctrine, cell principle, and the idea of cellular biology. Additional options include the theory of cellular construction, the tenet of cellular composition, and the understanding of cellular organization. By using these synonyms, writers can emphasize the importance of cell theory and help readers understand its significance in the field of biology.