(Greek: open market or meeting place) Large, open public space which served as a place for assembly for the citizens of a Greek city; the political, civic, religious and commercial center of a Greek city; buildings for all of these various purposes were constructed as needed in and around the agora.
pathology. 1. the branch of medicine treating of the essential nature of disease, especially of the changes in body tissues and organs that cause or are caused by disease. 2. the structural and functional manifestations of a disease. adj., adj pathologÂ´ic, pathologÂ´ical.
Epidemiology is defined as the branch of medicine that finds out what causes epidemics and how to control them. An example of epidemiology is the branch of medicine that includes the group of professionals who tracked down the cause of AIDS.