pólusa
Pólusa is the genitive singular form of the Polish noun pólus, which denotes a pole in a broad sense—geographic, magnetic, or an axis or end of a system. As a grammatical form, pólusa is used to express possession or relation to a pole, and it appears in technical or scientific language in phrases describing a pole.
In standard Polish, the word pólus is the base noun, while pólusa functions as its inflected form.
Etymology traces pólus to Latin polus, which in turn comes from Greek polos, both meaning a pole
Notes on terminology indicate that, outside of grammatical contexts, Polish prefers other terms for specific poles
See also: pólus, biegun, pole magnetyczny, geografia, etymologia polska.