1) Dinghy attachment 2) Gunwale attachment 3) Gunwale feature 4) Holder 5) Rowboat brace 6) Rowboat device 7) Rowboat fastener 8) Rowboat part 9) Rowing fulcrum 10) Rowlock 11) Scull part 12) Thole 13) Tholepin 1) Rowlock 2) Thole 3) Tholepin 
• (n.) The notch, fork, or other device on the gunwale of a boat, in which the oar rests in rowing. See Rowlock.
A pivoting device for holding an oar in place when rowing.
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 . 
The D-shaped device at the end of the rigger in which the oar rests. There is a locking gate at the top to keep the oar in place.
The U-shaped hardware that holds the oar.
the D-shaped device at the end of the rigger in which the oar rests. There is a locking gate at the top to keep the oar in place.
The u-shaped lock at the end of the rigger that attaches the oar to the shell. The oarlock allows the rower to rotate the oar between the squared and feathered positions.