I believe your questions is "the word biology derived from?"
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The word biology is derived from the greek words "bios" meaning "life" and "logos" meaning "study" and is defined as the science of life and living organisms.
Biology is a branch of science. Biology is the science of life. Biologists study the structure, function, growth, origin, evolution and distribution of living organisms. There are generally considered to be at least nine "umbrella" fields of biology, each of which consists of multiple subfields.