areoid

Etymology
. From, the Greek God of War, equivalent to the Roman God of War , synonymous use for the Red Planet; and suffix. Coined in analogy to, the equivalent for planet Earth.

Noun

 * 1)  The analogue of the geoid for the planet Mars; the Martian geoid. The gravitational and rotational equipotential surface for Mars. The surface that provides the datum line (the equivalent for sea level) for Mars.

Coordinate terms

 * Earth
 * Venus

Translations

 * German: Marsoid
 * Polish: marsoid