Handedness is a human attribute reflecting the unequal distribution of fine motor skill between the left and right hands.
Handedness may also refer to:
- Chirality, Greek for handedness, used to describe similar concepts in other fields:
- Chirality (chemistry), a property of molecules having a non-superimposable mirror image
- Chirality (electromagnetism), an electromagnetic propagation in chiral media
- Chirality (mathematics), the property of a figure not being identical to its mirror image
- Chirality (physics), when a phenomenon is not identical to its mirror image
- Sinistral and dextral, terms in biology and geology
- Orientation (vector space), an asymmetry that makes a reflection impossible to replicate by means of a simple rotation
- Handedness of a helix, a spiral structure
- Handedness of screw threads, springs, or propellers, in mechanics and engineering