| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Biological Factors | Health | Compounds made by living organisms that contribute to or influence a phenomenon or process. They have biological or physiological activities. (references) | |
| Immunologic and Biological Factors | Health | A collective grouping for biologically active substances that play a role in the functioning of the immune system and those that show biological or physiological activity. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
