| bio | the branch of biology concerned with the relations between organisms and their environment |
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| bio | a discrete unit of living matter |
| bio | a physicist who applies the methods of physics to biology |
| bio | physics as applied to biological problems |
| bio | examination of tissues or liquids from the living body to determine the existence or cause of a disease |
| bio | the act of treating waste or pollutants by the use of microorganisms (as bacteria) that can break down the undesirable substances |
| bio | the branch of biotechnology that uses biological process to overcome environmental problems |
| bio | any of the branches of natural science dealing with the structure and behavior of living organisms |
| bio | a kind of early movie projector |
| bio | a South African movie theater |
| bio | the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist |
| bio | production of a chemical compound by a living organism |