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- Dictionarybi·o·log·i·cal/ˌbīəˈläjək(ə)l/
adjective
- 1. relating to biology or living organisms. Similar Opposite
- 2. (of a member of a person's family) genetically related; related by blood: "the rights of the biological father"
noun
- 1. a therapeutic substance, such as a vaccine or drug, derived from biological sources: "an international biotechnology company with interests in biologicals, agriculture, and pharmaceutical products"
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