polar
/ˈpoʊlɚ/ noun C2- The line joining the points of contact of tangents drawn to meet a curve from a point called the pole of the line.
Plural polars
From the library
To combat the inevitable melancholy that accompanies the polar night, we prioritize communal activities and mutual support.
I frequently find myself gazing out the heavily insulated windows into the absolute void of the polar night.
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