filter bed

1. 1.

   filter consisting of a layer of sand or gravel for filtering water

   Broaderfilter

Questions about filter bed

What does filter bed mean?

filter bed means "filter consisting of a layer of sand or gravel for filtering water".

Is filter bed a common word?

filter bed is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.