bi‧o‧lo‧gi‧cal /ˌbaɪəˈlɒdʒɪkəl◂ $ -ˈlɑː-/ adjective

1. relating to the natural processes performed by living things:
the biological functions of the body
Depression is both biological and psychological.

2. biological weapons/warfare/attack etc weapons, attacks etc that involve the use of living things, including bacteria, to harm other living things:
a ban on chemical and biological weapons

3. [only before noun] relating to biology:
the biological sciences

4. biological parent/father/mother etc a child’s parent through birth, rather than through adoption
—biologically /-kli/ adverb

[TahlilGaran] Dictionary of Contemporary English ▲