abort
premature expulsion of viable foetus
abrad/ abras
scrape
abcess
collection of pus
absorpt
suck up
acanth
spiny, thorny
acetabul
acetabulum
Aetiology
Study of the cause or origin of a disease
Epidemiology
Study of how often diseases occur in different groups of people and why
Pathophysiology
Study of functional changes in abnormal conditions or disease states