Century Dictionary and Cyclopedia
- n. A small and generally circular movable plate affixed to an engraving containing a dial or lottery, and made to carry the index-hand or pointer; any movable engraving superimposed on another for the purpose of showing variations.
“Doctors and barbers used wheel diagrams like a 1486 volvelle from the guild book of the Barber Surgeons of York (also in Circa 1492) to determine propitious occasions for surgery.”
“20One of Publicius's wheels includes a vermiform serpent as its central volvelle rather than moveable rings, a detail perhaps conceived as a metonymic means to open and close the vermis valve in the brain, activating cogitation and recollection.”
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