| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Biological disk | Environment | In aerobic sewage treatment, closely spaced discs up to 3m diameter, or random plastic media in circular wire cages, that are carried by a horizontal shaft just above the surface of the sewage and revolve with the shaft. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
