polar coordinate is a noun meaning "either of two values that locate a point on a plane by its distance from a fixed pole and its angle from a fixed line passing through the pole". It carries one recorded sense.
either of two values that locate a point on a plane by its distance from a fixed pole and its angle from a fixed line passing through the pole
Definitions, synonyms and semantic relations for polar coordinate come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.