mega-Earth — English Dictionary

Noun

1. A type of terrestrial planet, with masses greater than that of super-Earths. A dense planetary mass object with a solid surface and little atmosphere. An exoplanet with a mass comparable to a gas giant or ice giant, but without its massive gaseous envelope. A planet with a radius of 2 Earth radii or more, and a density of 5 g/cm³ or more.

2. A type of terrestrial planet, with masses greater than that of super-Earths. A dense planetary mass object with a solid surface and little atmosphere. An exoplanet with a mass comparable to a gas giant or ice giant, but without its massive gaseous envelope. A planet with a radius of 2 Earth radii or more, and a density of 5 g/cm³ or more. A post-Cthonian planet, whose gaseous envelope has completely or almost completely been stripped.