Definition of cytology
1a : a branch of biology dealing with the structure, function, multiplication, pathology, and life history of cells : cell biology
b : the cellular aspects of a phenomenon, process, or structure liver cytology
2 : the microscopic examination of cells obtained from the body (as by aspiration or scraping) for diagnostic purposes : exfoliative cytology A Mayo study found that cytology is only 40 percent sensitive in detecting bladder cancer among people who have the disease. — Mayo Clinic Health Letter
— called also cytopathology
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