diathesis
- n constitutional predisposition to a particular disease or abnormality
diatom
- n microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
diatomaceous earth
- n a light soil consisting of siliceous diatom remains and often used as a filtering material
diatomite
- n a light soil consisting of siliceous diatom remains and often used as a filtering material