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Pronunciation varies by accent · noun
(astronomy) The apparent radius of a star etc, when viewed from Earth..
[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: [...]
Use semidiameter when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Semidiameter means (astronomy) The apparent radius of a star etc, when viewed from Earth..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
[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: [...]
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