AGROVOC

Accumulation of pus in the uterus, normally caused by severe bacterial infection. (https://lod.nal.usda.gov/nalt/60610)

A sewage field is a plant for the purification of waste water. The waste water is trickled over as large an area as possible on permeable soil. When seeping into the ground, harmful substances are mechanically filtered out by soil particles and biologically by sessile microorganisms. (BonaRes project)