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English definition of “biological”

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biological

adjective [not gradable]  /ˌbɑɪ·əˈlɑdʒ·ɪ·kəl/ us  
relating to the natural processes of living things: the biological sciences Biological also means being related through birth: the biological father/mother/parents
(Definition of biological from the Cambridge Academic Content Dictionary © Cambridge University Press)
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