# 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

Tagged: r

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