- Biological parent
a parent who has conceived (biological mother) or sired (biological father) rather than adopted a child and whose genes are therefore transmitted to the child.
Physics. the time required for one half the atoms of a given amount of a radioactive substance to disintegrate. Also called biological half-life. Pharmacology. the time required for the activity of a substance taken into the body to lose one half its initial effectiveness. Informal. a brief period during which something flourishes before dying out. […]
- Biological magnification
the increasing concentration of toxic substances within each successive link in the food chain. noun Examples
- Biological oxygen demand
biochemical oxygen demand.