parsec

par·sec

noun \ˈpär-ˌsek\

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

Origin of PARSEC

parallax + second

First Known Use: 1913

Rhymes with PARSEC

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