cytology Syllabification: (cy·tol·o·gy)Pronunciation: /sīˈtäləjē/Definition of cytology noun the branch of biology concerned with the structure and function of plant and animal cells. Derivatives cytologicalPronunciation: /ˌsītlˈäjikəl/ adjective cytologicallyPronunciation: /ˌsītlˈäjik(ə)lē/ adverb cytologistPronunciation: /-jist/ noun cytology in other Oxford dictionaries Definition of cytology in the British & World English dictionary