Principal axis

Principal axis may refer to:

• Principal axis (crystallography)
• Principal axis (mechanics)
• Principal axis theorem

See also

• Aircraft principal axes
• One of the two principal axes of a hyperbola
• Optical axis
• The highest-order symmetry axis of a molecule, based on its molecular symmetry

1. Principal axis theorem
2. Moment of inertia
3. Tennis racket theorem
4. Aircraft principal axes
5. Ellipsoid
6. Crystal structure
7. Axis powers
8. Principal component analysis
9. Schoenflies notation
10. Poinsot's ellipsoid
11. Symmetry operation
12. Curved mirror
13. Group theory
14. Zoisite
15. Rotation
16. Exploratory factor analysis
17. Stretch rule
18. Romania in World War II
19. Cardinal point (optics)
20. Molecular symmetry