411 REFERENCE · Wiktionary
Sinus Meridiani
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
en
Proper noun
1
en astronomy An albedo feature on Mars stretching east-west just south of the planet's equator.
en 1969 November Arthur Fisher Science Newsfront: Last-minute news and notes to keep you up-to-date w:Popular Science 195 5 NyoDAAAAMBAJ 22 Sinus Meridiani These pictures reveal, in the bright region west of the Sinus Meridiani, a totally unexpected Marscape of confused terrain that is like nothing man has seen on Earth, moon, or Mars before.