Definition for inner planet - Oxford Dictionaries Online (World English)

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	inner planet (inner planet) noun a planet whose orbit lies within the asteroid belt, i.e. Mercury, Venus, Earth, or Mars.		More words in this category Aristarchus 1 astrobiology balance Callisto COBE Corvus Dog Star extraterrestrial F-layer gravitational lens impact crater inflation iota lambda plasmapause refractor rille sidereal year stone Telescopium Nearby Words inner bar inner child inner circle inner city inner ear Inner House inner light inner man Inner Mongolia inner planet inner product inner sanctum inner space inner speech Inner Temple inner tube inner woman inner-directed innermost