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Definition of Astronomy unit
1. Noun. A linear unit used for astronomical distances.
Generic synonyms: Linear Measure, Linear Unit
Specialized synonyms: Light Year, Light-year, Light Hour, Light Minute, Light Second, Astronomical Unit, Au, Parsec, Secpar
Specialized synonyms: Light Year, Light-year, Light Hour, Light Minute, Light Second, Astronomical Unit, Au, Parsec, Secpar