Wiktionary
oar blade
n. The flanged portion of an oar; not the handle nor the shaft.
Usage examples of "oar blade".
The pirate had gone down with a crash as an oar blade ended his fight before it began.
A bullet smacked into the gunwale, while another shattered an oar blade.
Phosphorescence, like writhing little monsters of fire, leaped back from each stroking oar blade, and a long snake of the stuff clung to their stern, only to shorten itself and disappear entirely when Doc Savage gave the word to cease rowing.