Definition of parsec
: a unit of measure for interstellar space that is equal to 3.26 light-years and is the distance to an object having a parallax of one second as seen from points separated by one astronomical unit
Recent Examples of parsec from the Web
A parsec is a unit of distance, not time, so why would Solo use it to explain how quickly his ship could travel?
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Origin and Etymology of parsec
parallax + second
First Known Use: 1913
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