/ Dictionary / Index C cytology: Meaning and Definition of Find definitions for: cy•tol•o•gy Pronunciation: (sī-tol'u-jē), [key] — n. the study of the microscopic appearance of cells, esp. for the diagnosis of abnormalities and malignancies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cytology (Thesaurus) cytol. cytolysin Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language