a cylindrical gear wheel whose teeth follow the pitch surface in a helical manner.
Origin of helical gear
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a cylindrical gearwheel having the tooth form generated on a helical path about the axis of the wheel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012