Cytophotometrically is a word that is rarely used in everyday language. It refers to a technique that measures the chemical content of cells using different wavelengths of light. If you need to avoid using cytophotometrically in your writing, there are several synonyms that you can use. These include cell analysis, cell counting, fluorescence microscopy, and flow cytometry. Depending on the context in which you are using the term, you may also consider using more general terms such as laboratory analysis, scientific investigation, or cellular research. Regardless of which synonym you choose, be sure to clarify the meaning of the term for your readers.