oarlock

1. 桨架；桨叉
   The oarlocks on a rowing boat are the U-shaped pieces of metal that keep the oars in position while you move them backwards and forwards.

in BRIT, use 英国英语用 rowlock

1. Sleeve: The plastic jacket on the shaft of the oar upon which is mounted a button, used to secure the blade to the oarlock.
   桨保护套：套在桨上的有固定纽扣的塑料保护衣，用于使桨叶安全地固定在桨架上。
2. A short light oar used without an oarlock to propel a canoe or small boat.
   用来推动轻舟或小船的没有桨架的短小的桨。

noun

1. a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing

   Synonym:    pegpintholetholepinrowlock