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red planet is a noun meaning "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". It carries one recorded sense.
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”
Definitions, synonyms and semantic relations for red planet come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.