whipcord

from WordNet (r) 3.0 (2006)
whipcord
    n 1: closely twisted hard cord used for the lashes of whips
    2: a strong worsted or cotton fabric with a diagonal rib
    
from The Collaborative International Dictionary of English v.0.48
Whipcord \Whip"cord`\, n.
   A kind of hard-twisted or braided cord, sometimes used for
   making whiplashes.
   [1913 Webster]
    

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