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Pronunciation varies by accent · noun
(astronomy) A heliostat that may be used with stars as well as the sun..
Use siderostat when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Siderostat means (astronomy) A heliostat that may be used with stars as well as the sun..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use siderostat where its definition matches the intended context.
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