Definition of biological adjective from the Oxford Advanced Learner's Dictionary

     

    biological

     adjective
    adjective
    BrE BrE//ˌbaɪəˈlɒdʒɪkl//
     
    ; NAmE NAmE//ˌbaɪəˈlɑːdʒɪkl//
     
    Cell biology
     
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  1. 1connected with the science of biology the biological sciences See related entries: Cell biology
  2. 2connected with the processes that take place within living things the biological effects of radiation the biological control of pests (= using living organisms to destroy them, not chemicals) a child’s biological parents (= natural parents, not the people who adopted him/her) See related entries: Cell biology
  3. 3(of washing powder, etc.) using enzymes (= chemical substances that are found in plants and animals) to get clothes, etc. clean biological and non-biological powders See related entries: Cell biology
See the Oxford Advanced American Dictionary entry: biological