Astronautics Vocabulary

The Astronautics Vocabulary is a glossary of terms that pertain to the science and technology of spaceflight. This alphabetical list can be navigated by clicking on the letters A-Z displayed on this page.

Definition of meridian

Translation: méridien

Definition: The great circle on the celestial sphere passing through the poles and the zenith.

Other Definition: A line of longitude on the Earth or another astronomical body.

Synonym: None