Definition of "eggbeater"

With a wire eggbeater, lower the oysters into this three or four at a time.

1919, Herald and Presbyter, page 30

Bleeding.—Bleeding for therapuetic sera are made with trocar and rubber tube into 2-liter Erlenmeyer flasks having a large flat wire eggbeater to support the clot. After the flask is about half-full, it is tilted on the side where the wire is inserted.

1920, William Hallock Park, Public Health and Hygiene: In Contributions by Eminent Authorities, page 57

Taking advantage of the fact that a wire eggbeater of the type shown [pictured: a flat whisk] is so easily fastened between a camera tilt-head and the tripod, one photographer used such a beater to steady his camera […]

1944, Popular Mechanics, page 118

He scanned the horizon to the south, searching in vain for the eggbeater.

2008, George Galdorisi, Thomas Phillips, Leave No Man Behind: The Saga of Combat Search and Rescue