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[L. polus fr. Gr. polos, pivot, hinge, axis (of the globe), sky]
1. The extremity of any axis about which forces acting on it are symmetrically disposed.
SYN: SEE: polus
2. One of two points in a magnet, cell, or battery having opposite physical qualities.
3. In biology, the regions around each endpoint of a diameter (esp. an axis) of a sphere.