the study of the evolution of social forms and the development of social behavior in terms analogous to or correlated with biological studies.
nutrient-rich organic materials obtained from wastewater treatment and used beneficially, as for fertilizer: The application of biosolids to land improves soil properties and plant productivity, and reduces dependence on inorganic fertilizers. plural noun semisolid or solid organic material obtained from the recycling of sewage, used esp as a fertilizer biosolids (bī’ō-sŏl’ĭdz) Solid or semisolid organic […]
the study of organisms that live in caves. noun Word Origin