an auger having a helical outer surface suggesting a screw thread.
Origin of screw auger
An Americanism dating back to 1785–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for screw auger
Historical Examples of screw auger
Mr. Henry was the first to make the “rag” carpet, and was the inventor of the screw-auger.A History of the Growth of the Steam-Engine
Robert H. Thurston