/ baɪˈɒlədʒi; NAmE -ˈɑːl-/ noun [ U ]
1.
the scientific study of the life and structure of plants and animals :
a degree in biology
—compare botany , zoology
2.
the way in which the body and cells of a living thing behave :
How far is human nature determined by biology?
the biology of marine animals
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WORD ORIGIN
early 19th cent.: coined in German , via French from Greek bios life + -logy .