Wiktionary
n. 1 (&lit outer core English) 2 (context planetology English) The hot liquid material found near the centre of some planets, distinct from the solid inner core. 3 # (context geology English) The part of the Earth between the mantle and inner core, responsible for generating the planet's magnetic field.
Usage examples of "outer core".
An outer ring of white-uniformed human court officials, an inner ring of species-varied, extravagantly emblazoned courtiers and an outer core, again mixed-species, of Ascendancy, Omnocracy, Administrata and Cessoria - Fassin recognised most of them from the news and the few formal visits he'd had to make to the court over the years - formed semicircular tiers of importance around the being in the centre: the Hierchon Ormilla himself, resplendent in his giant platinum-sheathed discus of an environment suit, floating humming just above the highest platform, the dark creature's great gaping face visible through the suit's forward diamond window .
When they reached the vent port leading out onto the outer core corridor, Kira listened for a long time, not allowing O'Brien to open the panel.
The still-collapsing outer core would collide with it at half the speed of light—.
His plan to harness the power of the outer core was a good one, but the cost was fairy exposure, and that was too high a price to pay.
I finally decided it was part of the outer core, deep enough to be very hot and near enough the surface to have the silicates.
There is an inner solid core surrounded by an outer liquid core (as noted, it is the motion of the liquid outer core that is believed to generate the magnetic field of Earth).