Help Wordnik hunt for a million missing words by backing our Kickstarter!


from The Century Dictionary and Cyclopedia

  • n. A cog-wheel in the form of a scroll, the effect of which is to cause the gearing to rotate more slowly when engaged with its main parts than when it is working in the outer parts.
  • n. A form of turbine water-wheel, in which the passages for the water and the buckets have a shape approximating that of a spiral or scroll.


Sorry, no etymologies found.



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