Meaning of “biological” in the English Dictionary

"biological" in British English

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biologicaladjective

uk /ˌbaɪ.əˈlɒdʒ.ɪ.kəl/ us /ˌbaɪ.əˈlɑː.dʒɪ.kəl/

B2 connected with the natural processes of living things:

the biological sciences
Eating is a biological necessity!

[ before noun ] related by birth:

She decided to search for her biological mother after her adoptive parents died.

UK used to describe a substance used for cleaning that uses enzymes to remove dirt:

biological washing powder
Compare

using living matter, such as bacteria, to seriously harm and kill people and animals, and to damage crops:

biological weapons/warfare

More examples

  • Research involving the use of biological warfare agents will be used for defensive purposes.
  • Breathing and sleeping are examples of biological rhythms in humans.
  • Immunology is a branch of biological science.
  • a biological research station
  • biological weapons
biologically
adverb uk /ˌbaɪ.əˈlɒdʒ.ɪ.kəl.i/ us /ˌbaɪ.əˈlɑː.dʒɪ.kəl.i/

biologically active/stable chemicals

(Definition of “biological” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"biological" in American English

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biologicaladjective [ not gradable ]

us /ˌbɑɪ·əˈlɑdʒ·ɪ·kəl/

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)