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poky (2)
POL
pol
pol.
Polack
Poland
Poland China
polar
polar axis
polar bear
polar body
polar cap
polar circle
polar coordinates
polar distance
polar equation
polar front
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polar axis
po·lar ax·is (plural po·lar ax·es)


noun 
Definition:
 
fixed reference line: the fixed horizontal line in a system of polar coordinates from which the angle made by the radius vector is measured
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