Bible Dictionaries
Rock Shaft

Webster's Dictionary

A shaft that oscillates on its journals, instead of revolving, - usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines; - called also rocker, rocking shaft, and way shaft.

Bibliography Information
Webster, Noah. Entry for 'Rock Shaft'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​r/rock-shaft.html. 1828.