The Weekly Walla Walla Wine Word for Dummies is: Worm
No, it isn't that squiggly little critter that hangs out in the dirt, but it does have rather a squiggly shape.
A worm is the pointed metallic spiral helix that is attached to the handle of a corkscrew. The user grips the handle of the corkscrew and screws the metal point into the cork until the spiral is firmly embedded. Then with a vertical pull on the corkscrew the cork will be extracted from the bottle.
Worms are always made of metal and recently, many corkscrews have a Teflon ® coated worm for smooth and easier extractions.
The corkscrew itself can be of any style such as a sommelier/waiters, traditional wing, or the basic corkscrew with the simple wooden, hard plastic or metal handle.