Helicity may refer to: * Helicity (fluid mechanics), the extent to which corkscrew-like motion occurs * Helicity (particle physics), the projection of the spin onto the direction of momentum * Magnetic helicity, the extent to which a magnetic field "wraps around itself" *

Circular dichroism Circular dichroism (CD) is dichroism involving circular polarization, circularly polarized light, i.e., the differential Absorption (electromagnetic radiation), absorption of left- and right-handed light. Left-hand circular (LHC) and right-hand ci ...

, the differential absorption of left and right circularly polarized light * A form of

axial chirality In chemistry, axial chirality is a special case of chirality (chemistry), chirality in which a molecule contains two pairs of chemical groups in a non-planar arrangement about an axis of chirality so that the molecule is not superposable on its mi ...

* A former name for inherent chirality

See also