biosolid
/ˈbaɪoʊˌsɑlɪd/
noun
- A solid organic material, especially treated sewage sludge, used as a fertilizer or soil conditioner.
- Scientists tested the biosolid for heavy metals before approving its use.
- The treatment plant turns waste into a safe biosolid for gardening.
- Farmers sometimes use biosolid to enrich their fields with nutrients.