heˈlisə̇d.ē, hə̇- noun
( -es )
Etymology: helic- + -ity
1. : the motion of a particle about an axis parallel to its direction of motion
2. : the component of the spin of a particle in its direction of motion measured in quantum units of spin
3.
a. : the quality or state of being helical
b. : the amount or degree of helical curve