Liberal Dictionary English Dictionary
noun
- a layer of sand or gravel used to expose sewage effluent, in its final stages, to air and the action of microorganismsCompare filter bed (def. 1)
The Bacteria In Your Bed – Sleep Made To Measure
What Happens When You Don’t Wash Bed Sheets Regularly – Organic
Millions of mattresses are swarming with bacteria, mould | The