The word biological may refer to:

• Adjectival form of "biology", the study of life
• Biological (noun), a biological preparation (e.g., a vaccine or antitoxin) that is synthesized from living organisms or their products and used medically as a diagnostic, preventive, or therapeutic agent. (Often used in distinction to a pharmaceutical (drug)).
• Biological agent, an infectious disease or toxin that can be used in bioterrorism or biological warfare.
• Biological tissue
• Biological process
• Organism, a biological entity
• Life, the characteristic state of organisms
• Consanguinity, being descended from the same ancestor

Materials and substances:

Main disambiguation page: Biological material

See also

• Biological warfare
• Organic (disambiguation)