cytophotometry Syllabification: (cy·to·pho·tom·e·try)Pronunciation: /ˌsītəfōˈtämətrē/Definition of cytophotometry noun Biology the investigation of the contents of cells by measuring the light they allow through after staining. Derivatives cytophotometerPronunciation: /-ˈtämətər/ noun cytophotometricPronunciation: /-ˌfōtəˈmetrik/ adjective cytophotometry in other Oxford dictionaries Definition of cytophotometry in the British & World English dictionary