Oarlock

Oar'lock` (ōr'lŏk`) noun (Nautical) , The notch, fork, or other device on the gunwale of a boat, in which the oar rests in rowing. See Rowlock .
Found on http://www.encyclo.co.uk/webster/O/1

Oarlock

• (n.) The notch, fork, or other device on the gunwale of a boat, in which the oar rests in rowing. See Rowlock.
Found on http://thinkexist.com/dictionary/meaning/oarlock/

oarlock

A pivoting device for holding an oar in place when rowing.
Found on http://www.diy-wood-boat.com/Boating-terms.html
No exact match found