sheepshank

from WordNet (r) 3.0 (2006)
sheepshank
    n 1: a knot for shortening a line
    
from The Collaborative International Dictionary of English v.0.48
Sheepshank \Sheep"shank`\, n. (Naut.)
   A hitch by which a rope may be temporarily shortened.
   [1913 Webster]
    

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