Noun
a light soil consisting of siliceous diatom remains and often used as a filtering material
Source: WordNetDiatomaceous earth is not usually used today as an absorbent medium and it has been replaced by cheaper mediums like sawdust, wood pulp, flour, or starch. Source: Internet
‘Experimenting with different mixtures, engineers and scientists came up with a recipe that includes play sand for children's sandboxes, diatomaceous earth for swimming pool filters and mortar clay powder.’ Source: Internet
‘The use of gritty materials such as diatomaceous earth scattered on the soil surface is also used.’ Source: Internet