Definition of spherical coordinate
: one of three coordinates that are used to locate a point in space and that comprise the radius of the sphere on which the point lies in a system of concentric spheres, the angle formed by the point, the center, and a given axis of the sphere, and the angle between the plane of the first angle and a reference plane through the given axis of the sphere
First Known Use of spherical coordinate
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Britannica.com: Encyclopedia article about spherical coordinate
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