volvelle means A type of slide chart, a paper construction with rotating parts, formerly used for organization and calculation in astronomy and other subjects. Lexicurio rates it Sui generis — a strength score of 90 out of 100.
Why this word is great
VOLVELLE — [Noun] A layered paper instrument with rotating dials, historically used as an analog calculator or instructional device in astronomy, medicine, and timekeeping. From Medieval Latin volvella or volvellum, a diminutive form from Latin volvere (“to turn, to roll”). Unlike the rigid, linear calculation of the slide rule or the mechanical, three-dimensional grandeur of the orrery, the volvelle is a delicate engine of parchment and intention. It is the whisper of a vellum moon-phase wheel turning in a scholar’s hand, the patient alignment of a bloodletting chart with a window of days, and the crisp rotation of a disc that predicts a tide—a hand-held cosmology where understanding was a thing to be physically turned over, mastered by a paper pivot and destined to crumble.
noun
- A type of slide chart, a paper construction with rotating parts, formerly used for organization and calculation in astronomy and other subjects.“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.”