semidiameter

Tanımlar (İngilizce)

1. isim The apparent radius of a star etc, when viewed from Earth.
2. isim A radius: half of a diameter.

   “[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: [...]”