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polar axis

   Also found in: Dictionary/thesaurus 0.04 sec.
polar axis [′pō·lər ′ak·səs]
(crystallography)
An axis of crystal symmetry which does not have a plane of symmetry perpendicular to it.
(mathematics)
The directed straight line relative to which the angle is measured for a representation of a point in the plane by polar coordinates.


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No, Maguire will not tell us that a football is an aerodynamic elliptical prolate spheroid which has a polar axis longer than its equatorial diameter, weighs between 14 and 15 ounces, is 28-1/2 inches at its long axis and contains 13-1/2 pounds of air pressure in its steer hide-encased bladder.
The asteroid measures about 584 by 531 km, and about 467 km where it is "flattened,' in the direction of its polar axis.
He is particularly known for discovering numerous aspects of the complex and subtle dynamical interactions between planetary objects and gaseous and particle disks, for helping to give birth to the giant impact theory of lunar formation and for discovering the oscillations in Mars' polar axis that drive strong climate variation over time.
 
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