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Pronunciation varies by accent · noun
(astronomy) An astronomical unit of distance equal to 10⁹ parsecs..
Use gigaparsec when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Gigaparsec means (astronomy) An astronomical unit of distance equal to 10⁹ parsecs..
Common synonyms include Gpc.
The opposite depends on the specific sense.
Use gigaparsec where its definition matches the intended context.
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