Biologic is an adjective and noun meaning "relating to biology; a medical product derived from living organisms". Historically, it is from biology (Greek bios 'life' + -logia 'study of') + -ic; the noun sense (a drug derived from living sources) is a 20th-century development. The visible construction is part of the etymology: biologic is not just an unanalyzed simple word. The semantic history matters here: the earlier use is the starting point, and the modern sense, "relating to biology; a medical product derived from living organisms", is the later or specialized English value. The historical chain links Ancient Greek bíos with Ancient Greek -logía. Close English family members include biology, biological, and biologist.