- connected with the science of biology
- the biological sciences
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- connected 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)
- (of a member of a person's family) related by blood
- a child’s biological parents (= natural parents, not the people who adopted him/her)
- (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
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biological