Wordnet polsko-angielski 
                         (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) 
parsec, secpar 
synonim: pc
Otwarty słownik polsko-angielski V.9.2007, Copyright (c) Jerzy Kazojć - 2007 r.
                        parsec
Nowoczesny słownik polsko-angielski 
                        pc