Search Result for "polar coordinate":
Wordnet 3.0

NOUN (1)

1. 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; 



WordNet (r) 3.0 (2006):

polar coordinate
    n 1: 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