percolating filter
noun
A type of filter used in the treatment of sewage, usually after the removal of suspended solids, consisting of a bed of inert, porous material such as crushed rock, through which the sewage is allowed to percolate so that noxious organic matter is removed by aerobic microorganisms.
Origin
Early 20th century.
- periapt
- periaqueductal
- periarterial
- periarteritic
- periarteritis
- periarteritis nodosa
- periarthritis
- periarticular
- periaster
- periastron
- periaxial
- periblast
- periblastic
- periblem
- peribolos
- peribolus
- peribranchial
- peribronchial
- peribronchitis
- peribursal
- pericaecal
- pericambium
- pericapillary
- pericard
- pericardectomy