decomposer
nounUK /diːkəmˈpəʊzə(ɹ)/
Etymology From decompose + -er.
1
Biology, Ecology, Natural sciences A substance or an organism, such as a bacterium or fungus, which carries out the process of decomposition of organic material.
- Admitted farm dung is a slow decomposer, but we have moisture in the dung and heat in the soil to bring about decomposition […]1893, The Planters' Monthly, volume 12, page 202: