Radius-vector


noun, plural radii vectores
[vek-tawr-eez, -tohr-] /vɛkˈtɔr iz, -ˈtoʊr-/ (Show IPA), radius vectors.
1.
Mathematics. the length of the line segment joining a fixed point or origin to a given point.
2.
Astronomy.

noun
1.
(maths) a line joining a point in space to the origin of polar or spherical coordinates
2.
(astronomy) an imaginary line joining a satellite to the planet or star around which it is orbiting
radius vector

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