Bevel gear. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/bevel-gear
(plural bevel gears)
A kind of gear in which the two wheels working together lie in different planes and have their teeth cut at right angles to the surfaces of two cones whose apicescoincide with the point where the axes of the wheels would meet.
English Wiktionary. Available under CC-BY-SA license.