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Definition of Red planet
1. Noun. A small reddish planet that is the 4th from the sun and is periodically visible to the naked eye; minerals rich in iron cover its surface and are responsible for its characteristic color. "Mars has two satellites"
Exact synonyms: Mars
Group relationships: Solar System
Generic synonyms: Superior Planet, Terrestrial Planet
Derivative terms: Martian
Group relationships: Solar System
Generic synonyms: Superior Planet, Terrestrial Planet
Derivative terms: Martian
Definition of Red planet
1. Noun. the planet Mars ¹
¹ Source: wiktionary.com