| diathermy | (noun) a method of physical therapy that involves generating local heat in body tissues by high-frequency electromagnetic currents | - |
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| diathesis | (noun) constitutional predisposition to a particular disease or abnormality | - |
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| diatom | (noun) microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica | - |
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| diatomite | (noun) a light soil consisting of siliceous diatom remains and often used as a filtering material | Synonyms: diatomaceous earth, kieselguhr |
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| diatribe | (noun) thunderous verbal attack | Synonyms: fulmination |
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