Grapnel

from WordNet (r) 3.0 (2006)

grapnel
    n 1: a tool consisting of several hooks for grasping and
         holding; often thrown with a rope [syn: {grapnel},
         {grapple}, {grappler}, {grappling hook}, {grappling iron}]
    2: a light anchor for small boats [syn: {grapnel}, {grapnel
       anchor}]

from The Collaborative International Dictionary of English v.0.48

Grapnel \Grap"nel\, n. [OE. grapenel, dim. fr. F. grappin the
   grapple of a ship; of German origin. See {Grape}.] (Naut.)
   A small anchor, with four or five flukes or claws, used to
   hold boats or small vessels; hence, any instrument designed
   to grapple or hold; a grappling iron; a grab; -- written also
   grapline, and crapnel.
   [1913 Webster]