shortener

from WordNet (r) 3.0 (2006)
shortener
    n 1: any agent that shortens; "alcohol is a great shortener of
         life"
    
from The Collaborative International Dictionary of English v.0.48
Shortener \Short"en*er\, n.
   One who, or that which, shortens.
   [1913 Webster]
    

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