semidiameter — English Dictionary

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Language

semidiameter

Noun

The apparent radius of a star etc, when viewed from Earth.
A radius: half of a diameter.
Usage
- Archaic
Examples

More examples (1)

[B]etweene the ſphere of Saturne and the Firmament, there is ſuch an incredible and vaſt ſpace or diſtance (7000000. ſemidiameters of the earth, as Tycho [Brahe] calculates) void of ſtarres: [...]

Noun

the apparent radius of a celestial body when viewed as a disc from the earth

Broader terms
radius r

Word forms

semidiameters

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