phys ‧ i ‧ ol ‧ o ‧ gy /ˌfɪziˈɒlədʒi $ -ˈɑː-/ BrE AmE noun [uncountable]
1 . the science that studies the way in which the bodies of living things work:
a book on biochemistry and physiology
2 . the way the body of a person or an animal works ⇨ anatomy :
the physiology of the brain
—physiological adjective