volvelle
[ vol-vel ]
/ ˈvɒl vɛl /
noun Astronomy.
a medieval instrument consisting of a series of concentric rotating disks, used to compute the phases of the moon and its position in relation to that of the sun.
Origin of volvelle
1400–50; late Middle English < Medieval Latin
volvella, equivalent to Latin
volv(ere) to turn +
-ella
-elle
Words nearby volvelle
volute,
volute spring,
volutin,
volution,
volva,
volvelle,
volvent,
volvox,
volvulosis,
volvulus,
volzhsky