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Definition of Parsec
1. Noun. A unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years.
Definition of Parsec
1. Noun. (astronomy metrology) parallax second ¹
¹ Source: wiktionary.com
Definition of Parsec
1. a unit of astronomical distance [n -S]