DEFINE THE FOLLOWING: 



COMMINUTION Reducing drugs to fine particles. 



DESICCATION Is depriving solid substances of 

 moisture at a low temperature. 



DELIQUESCENCE Is the absorption of moisture 

 from the air by a salt. 



DISTILLATION Vaporizing and condensing a 

 liquid. 



DESTRUCTIVE DISTILLATION Is that in which the 

 substance is consumed and the products of combus- 

 tion are condensed and collected. 



DIGESTION Is maceration with the addition of 

 gentle heat. 



DECANTATION The process of separating a fluid 

 from a solid by allowing the solid to deposit at the 

 bottom of the vessel and pouring off the liquid. 



DIALYSIS Is separating crystallizable from un- 

 crystallizable solids by placing a solution containing 

 both in a porous diaphragm, the under surface of 

 which is in contact with water. 



EFFLORESCENCE A loss of moisture by a salt in 

 presence of air. 



ELUTRIATION Is obtaining a fine powder by sus- 

 pending an insoluble powder in water and decanting 

 the liquid containing the lighter particles. 



EMULSION An aqueous preparation in which oily 

 or resinous substances are suspended by the agency 

 of viscid or gummy substances. 



EXSICCATION Depriving solid substances of moist- 

 ure at a high temperature. 



EFFERVESCENCE Ebullition from chemical re- 

 action. 



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