| Term | Definition |
| bio | life |
| abiogenesis | development of life from lifeless matter |
| amphibious | able to live on both land and in water |
| antibiotic | antibacterial substance produced by a living organism |
| autobiography | story of a person's life written by that person |
| biochemistry | chemistry dealing with chemical compounds and processes in living plants and animals |
| biocidal | destructive to life or living things |
| biodegradable | capable of being readily decomposed into harmless substances by living microorganisms |
| biogenesis | development of life from preexisting life |
| biography | story of a person's life written by another person |
| biology | science dealing with the study of living organisms |
| biometry | statistical calculation of the probable duration of human life |
| biopsy | diagnostic examination of a piece of tissue from the living body |
| biota | the living plants (flora) and living animals (fauna) of a region |
| microbe | microorganism; germ |
| symbiosis | the living together in mutually helpful association of two dissimilar organisms |