volvelle

Inherited from Middle English volvelle, from Medieval Latin volvellum, volvella, from volvō +‎ -ellum.

• (Received Pronunciation) IPA^(key): /ˈvɒlˌvɛl/
• (General American) IPA^(key): /ˈvɑlˌvɛl/

volvelle (plural volvelles)

1. (historical) A type of slide chart, a paper construction with rotating parts, formerly used for organization and calculation in astronomy and other subjects.
   • c. 1521, John Skelton, Speke Parott:

     Tholomye and Haly were cunnynd and wyſe
     In the voluell, in the quadrant, and in the aſtroloby,
     To pronoſtycate truly the chaunce of fortunys dyſe.

Borrowed from Medieval Latin volvella, variant of volvellum, from volvō +‎ -ellum.

• volvel

• IPA^(key): /vɔlˈvɛl(ə)/, /ˈvɔlvɛl(ə)/

volvelle

1. A moving part of an astronomical instrument.

• English: volvelle

• “volvelle, n.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.

volvelle

1. (Kent) Alternative form of fulfillen