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- polar solid angle
- polar solvent
- polar space
- polar spot
- polar star
- polar state
- polar stereographic projection
- polar stratospheric clouds
- polar streamer
- polar subnormal
- polar substrate
- polar subtangent
- polar surface
- polar sway
- polar system
- polar tangential coordinate
- polar telescope
- polar tetrahedron
- polar theory
- polar tide
- polar transformation
- polar translocation
- polar triangle
- polar trihedral
- polar tropopause