center of curvature
Noun
Meaning
the center of the circle of curvature
Source: WordNetSynonyms
Hypernyms
Examples
Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.
That direction is not toward the center of curvature of the path, however, which is the direction of the true centripetal force.