Jovian a. : Of or pertaining to Jove, or Jupiter (either the deity or the planet).

Example:
Would the terrestrial or Jovian planets be least likely to hold on to atmospheric gases?

Taxonomy
Jovian planet, free encyclopedia, Roman emperor, the planet Jupiter, search, free dictionary, adjectival, Italian, humanist, poet, Jovians, Ioviani, Roman imperial, imperial guard, guard corps, relation to, planet, disambiguation pages.

Defination from the web:
Jovian planet, a term in astronomy, also called a Gas giant, term used to describe Jupiter, Saturn, Uranus, and Neptune. Jovian (fiction), a hypothetical or fictional native inhabitant of the planet Jupiter, This disambiguation page lists articles associated with the same title. ...