noun. ['ˈpɑːrˌsɛk'] 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.
- astronomy unit
Words that Rhyme with Parsec
Example sentences of the word parsec
1. Noun, singular or mass
This gives rise to the parsec, a unit derived by scribing an imaginary right triangle in the sky.