from The Century Dictionary and Cyclopedia

  • n. In steam-engines, a shaft that oscillates or rocks on its journals instead of revolving; specifically, a vibrating shaft with levers which works the slide-valves of some engines.
  • n. In mining, a shaft constructed for sending down rock for filling stopes which have been worked out. It is usually provided with a valve or trap at the bottom so that rock may be thrown into it at any time and taken out as it is wanted.


Sorry, no etymologies found.


Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.