parsec or parsec.
(Of theingl. )( parsec, acrón. ofpairallax second, Parallax second).
1. m. Astr. Astronomical length unit equal to the distance of a celestial body from which would be the semimajor axis of the orbit with an angle of one second of arc. It is equal to 3.26 light-years. (Símb.) pc).
