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diapir
diapositive
diarchy
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diarrhea
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diatomite
di·at·o·mite [ dī áttə mt ]


noun 
Definition:
 
powdery rock with industrial uses: a soft powdery porous rock. Source: accumulated shells of diatoms. Use: in fireproof cements, insulating materials, dynamite, as insecticide.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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