What is the X in X-mas?
"science of diseases," 1610s, from French pathologie (16c.), from medical Latin pathologia "study of disease," from Greek pathos "suffering" (see pathos) + -logia "study" (see -logy). In reference to the study of abnormal mental conditions from 1842. Ancient Greek pathologia was "study of the passions;" the Greek word for "science of diseases" was pathologike ("pathologics").
pathologist pa·thol·o·gist (pā-thŏl'ə-jĭst)
A specialist in pathology who practices chiefly in the laboratory as a consultant to clinical colleagues.
pathology pa·thol·o·gy (pā-thŏl'ə-jē)
The medical science concerned with all aspects of disease with an emphasis on the essential nature, causes, and development of abnormal conditions, as well as with the structural and functional changes that result from disease processes.
The anatomical or functional manifestations of a disease.
A branch of medicine that explores the nature and cause of disease. Pathology also involves the study of bodily changes that occur as the result of disease.