Definition of biological in English:

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Pronunciation: /ˌbīəˈläjək(ə)l/
(abbreviation biol.)


1Relating to biology or living organisms.
Example sentences
  • IBM has unveiled an ambitious initiative to develop technologies that share the basic biological abilities of living organisms.
  • This heavy metal has no known biological function in living organisms.
  • Biotechnology is the use of living organisms or biological substances to discover or produce therapeutic remedies.
biotic, biologic, organic, living;
botanic, botanical, zoologic, zoological
1.1Relating to or involving the use of microorganisms or toxins of biological origin as weapons of war.
Example sentences
  • Chemical toxins differ from biological weapons in that they are nonliving pathogens and require direct infection and contact with the victim.
  • To reduce the severity and extent of war if it does break out, for example by limiting possession and use of nuclear and chemical and biological weapons.
  • This element is the presence of weapons of mass destruction, WMD, which includes chemical, toxin, biological, and nuclear weapons.
1.2(Of a detergent or other cleaning product) containing enzymes to assist the process of cleaning.
Example sentences
  • Use biological washing powder to clean your roasting tins: sprinkle in a cup of powder, add warm water and leave to soak for an hour
  • Biological cleaning solutions, being natural and generally harmless, are very safe to use meaning cleaning staff are protected during general use and in the event of accidental spillages
  • The pre-treatment and/or post-treatment baths are compatible with the biological cleaning bath and during operation of the system, the used pre-treatment and/or post-treatment baths are recycled to the biological cleaning solution for biodegradation.
2(Of a member of a person’s family) genetically related; related by blood: the rights of the biological father
More example sentences
  • And the mother and father, the biological parents of this baby were in the wind but the grandparents lived in New Jersey.
  • Scientists are to carry out the first British experiments on human embryos that would create a baby with three biological parents - two mothers and a father.
  • Parenting is separated from sexuality in a way that it is not for heterosexual parents with biological children.


(usually biologicals)
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
More example sentences
  • Pass-Through Codes are temporary codes for which hospital outpatient departments receive payments in addition to the APC rate for certain biologicals, drugs, and innovative medical devices.
  • The Merck index: an encyclopedia of chemicals, drugs & biologicals.
  • The MMA changed the payment rates for many drugs, biologicals, and services.

For editors and proofreaders

Syllabification: bi·o·log·i·cal

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