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Definition of speed,frighten,disappear,expert,surrender,day,dog,wide,version,flow." Pimsleur language courses. Web. 19 Feb. 2010. .
"Speed Define Speed at Dictionary.com." Dictionary.com Find the Meanings and Definitions of Words at Dictionary.com. Web. 19 Feb. 2010. >.
"Speed - definition of speed by the Free Online Dictionary, Thesaurus and Encyclopedia." Dictionary, Encyclopedia and Thesaurus - The Free Dictionary. Web. 19 Feb. 2010. .
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"Speed (drug) - definition of Speed (drug) in the Medical dictionary - by the Free Online , Thesaurus and Encyclopedia." Medical Dictionary. Web. 19 Feb. 2010. .