Oarlock
Oarlock (ōr"lok`) , noun
(Nautical) 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 Rowlock{1}.