| Bacteriology |
Study of bacteria |
| Balneology |
The science of the therapeutic use of baths |
| Barodynamics |
Science of the support and mechanics of bridges |
| Barology |
Study of gravitation |
| Batology |
The study of brambles |
| Bibliology |
Study of books |
| Bibliotics |
Study of documents to determine authenticity |
| Bioecology |
Study of interaction of life in the environment |
| Biology |
Study of life |
| Biometrics |
Study of biological measurement |
| Bionomics |
Study of organisms interacting in their environments |
| Botany |
Study of plants |
| Bromatology |
Study of food |
| Brontology |
Scientific study of thunder |
| Bryology |
The study of mosses and liverworts |