| in the three-dimensional Euclidean space, mathematical entity which can be represented by a vector independently of the space orientation Note 1 to entry: The term "polar vector" is only used in place of the term "vector" to distinguish it from the term "axial vector". Note 2 to entry: Examples of polar vectors are a geometric displacement and the gradient of a scalar field, and examples of polar vector quantities are velocity and electric field strength.
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