bi ‧ ol ‧ o ‧ gy /baɪˈɒlədʒi $ -ˈɑːl-/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: German ; Origin: biologie , from bio- + -logie '-logy' ]
1 . the scientific study of living things:
a degree in biology
2 . the scientific laws that control the life of a particular type of animal, plant etc:
the biology of bacteria