oar·lock /-ˌlɑk/
  槳架
  Oar·lock n. Naut., The notch, fork, or other device on the gunwale of a boat, in which the oar rests, and that holds the oar in place and acts as a fulcrum for rowing.  Certain oarlocks are designed for use with oars having attached swivels, which insert into the oarlock and provide a firm pivot.  Same as Rowlock1.
  Syn: -- peg, pin, thole, tholepin, rowlock.
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  oarlock
       n : a holder attached to the gunwale of a boat that holds the
           oar in place and acts as a fulcrum for rowing [syn: peg,
            pin, thole, tholepin, rowlock]