What kind of physical quantity is angular displacement?

Question

Angular Displacement is neither a vector nor a scalar.

What type of physical quantity it is? Are there any other examples of that physical quantity?

Was your question answered? – Bryson S. Jul 17 '14 at 15:59 — Bryson S., Jul 17 '14 at 15:59
Related: http://physics.stackexchange.com/q/69345/2451 – Qmechanic Nov 29 '14 at 18:53 — Qmechanic, Nov 29 '14 at 18:53

score 5 · Answer 1 · answered Jul 15 '14 at 03:29

Angular displacement is an example of what's generally called a pseudovector. This is a quantity that is similar to a regular vector, except for the fact that it behaves differently under improper rotations such as reflections (it gains an additional sign flip). Any quantity which is the cross-product of two polar vectors will generally be a pseudovector. Other examples include magnetic fields, angular momentum, torque and vorticity.

What kind of physical quantity is angular displacement?

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